20900908 has 24 divisors (see below), whose sum is σ = 41898752. Its totient is φ = 8936784.

The previous prime is 20900903. The next prime is 20900911. The reversal of 20900908 is 80900902.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (20900903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22591 + ... + 23497.

Almost surely, 2^20900908 is an apocalyptic number.

20900908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20900908 is an abundant number, since it is smaller than the sum of its proper divisors (20997844).

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

20900908 is a wasteful number, since it uses less digits than its factorization.

20900908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1741 (or 1739 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 20900908 is about 4571.7510868375. The cubic root of 20900908 is about 275.4577851728.

The spelling of 20900908 in words is "twenty million, nine hundred thousand, nine hundred eight".