20312908 has 24 divisors (see below), whose sum is σ = 44319744. Its totient is φ = 7914000.

The previous prime is 20312869. The next prime is 20312911. The reversal of 20312908 is 80921302.

It is a super-2 number, since 2×20312908² = 825228462832928, which contains 22 as substring.

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, 32668 + ... + 33283.

It is an arithmetic number, because the mean of its divisors is an integer number (1846656).

Almost surely, 2^20312908 is an apocalyptic number.

20312908 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20312908 is an abundant number, since it is smaller than the sum of its proper divisors (24006836).

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

20312908 is a wasteful number, since it uses less digits than its factorization.

20312908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65973 (or 65971 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 20312908 is about 4506.9843576387. The cubic root of 20312908 is about 272.8500475768.

The spelling of 20312908 in words is "twenty million, three hundred twelve thousand, nine hundred eight".