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21941016 = 2331753777
BaseRepresentation
bin101001110110…
…0101100011000
31112021201102020
41103230230120
521104103031
62102134440
7354331656
oct123545430
945251366
1021941016
1111426679
127421420
134712a66
142cb1dd6
151dd6096
hex14ecb18

21941016 has 32 divisors (see below), whose sum is σ = 58080240. Its totient is φ = 6883328.

The previous prime is 21940981. The next prime is 21941021. The reversal of 21941016 is 61014912.

It is a super-2 number, since 2×219410162 = 962816366224512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26481 + ... + 27296.

Almost surely, 221941016 is an apocalyptic number.

21941016 is the 2963-rd centered pentagonal number.

It is an amenable number.

21941016 is an abundant number, since it is smaller than the sum of its proper divisors (36139224).

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

21941016 is a wasteful number, since it uses less digits than its factorization.

21941016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53803 (or 53799 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 21941016 is about 4684.1238241532. The cubic root of 21941016 is about 279.9532915284.

Adding to 21941016 its reverse (61014912), we get a palindrome (82955928).

The spelling of 21941016 in words is "twenty-one million, nine hundred forty-one thousand, sixteen".

Divisors: 1 2 3 4 6 8 12 17 24 34 51 68 102 136 204 408 53777 107554 161331 215108 322662 430216 645324 914209 1290648 1828418 2742627 3656836 5485254 7313672 10970508 21941016