20158908 has 48 divisors (see below), whose sum is σ = 58646784. Its totient is φ = 5235840.

The previous prime is 20158891. The next prime is 20158909. The reversal of 20158908 is 80985102.

It is a happy number.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20158909) 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, 9985 + ... + 11832.

It is an arithmetic number, because the mean of its divisors is an integer number (1221808).

Almost surely, 2^20158908 is an apocalyptic number.

20158908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20158908 is an abundant number, since it is smaller than the sum of its proper divisors (38487876).

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

20158908 is a wasteful number, since it uses less digits than its factorization.

20158908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21842 (or 21840 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 20158908 is about 4489.8672586169. The cubic root of 20158908 is about 272.1587704829.

The spelling of 20158908 in words is "twenty million, one hundred fifty-eight thousand, nine hundred eight".