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20019886 = 237270539
BaseRepresentation
bin100110001011…
…1101010101110
31101200010010021
41030113222232
520111114021
61553032354
7332111005
oct114275256
941603107
1020019886
1110334267
1268556ba
1341bc4b3
142931c3c
151b56c41
hex1317aae

20019886 has 8 divisors (see below), whose sum is σ = 30841560. Its totient is φ = 9739368.

The previous prime is 20019869. The next prime is 20019887. The reversal of 20019886 is 68891002.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20019887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 135196 + ... + 135343.

It is an arithmetic number, because the mean of its divisors is an integer number (3855195).

Almost surely, 220019886 is an apocalyptic number.

20019886 is a deficient number, since it is larger than the sum of its proper divisors (10821674).

20019886 is a wasteful number, since it uses less digits than its factorization.

20019886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270578.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 20019886 is about 4474.3587250018. The cubic root of 20019886 is about 271.5316967065.

The spelling of 20019886 in words is "twenty million, nineteen thousand, eight hundred eighty-six".

Divisors: 1 2 37 74 270539 541078 10009943 20019886