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21861096 = 23319191251
BaseRepresentation
bin101001101100…
…1001011101000
31112010122210020
41103121023220
521044023341
62100320440
7353546655
oct123311350
945118706
1021861096
1111381624
1273a3120
1346b557a
142c90c2c
151dbc566
hex14d92e8

21861096 has 64 divisors (see below), whose sum is σ = 58060800. Its totient is φ = 6840000.

The previous prime is 21861083. The next prime is 21861097. The reversal of 21861096 is 69016812.

It is not an unprimeable number, because it can be changed into a prime (21861097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86971 + ... + 87221.

It is an arithmetic number, because the mean of its divisors is an integer number (907200).

Almost surely, 221861096 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21861096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29030400).

21861096 is an abundant number, since it is smaller than the sum of its proper divisors (36199704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21861096 is a wasteful number, since it uses less digits than its factorization.

21861096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 21861096 is about 4675.5850970761. The cubic root of 21861096 is about 279.6129686720.

The spelling of 21861096 in words is "twenty-one million, eight hundred sixty-one thousand, ninety-six".

Divisors: 1 2 3 4 6 8 12 19 24 38 57 76 114 152 191 228 251 382 456 502 573 753 764 1004 1146 1506 1528 2008 2292 3012 3629 4584 4769 6024 7258 9538 10887 14307 14516 19076 21774 28614 29032 38152 43548 47941 57228 87096 95882 114456 143823 191764 287646 383528 575292 910879 1150584 1821758 2732637 3643516 5465274 7287032 10930548 21861096