20313508 has 24 divisors (see below), whose sum is σ = 39049920. Its totient is φ = 9203040.

The previous prime is 20313493. The next prime is 20313509. The reversal of 20313508 is 80531302.

It is not an unprimeable number, because it can be changed into a prime (20313509) 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, 4063 + ... + 7558.

It is an arithmetic number, because the mean of its divisors is an integer number (1627080).

Almost surely, 2^20313508 is an apocalyptic number.

It is an amenable number.

20313508 is a deficient number, since it is larger than the sum of its proper divisors (18736412).

20313508 is a wasteful number, since it uses less digits than its factorization.

20313508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11667 (or 11665 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 20313508 is about 4507.0509205022. The cubic root of 20313508 is about 272.8527340200.

The spelling of 20313508 in words is "twenty million, three hundred thirteen thousand, five hundred eight".