20313156 has 12 divisors (see below), whose sum is σ = 47397392. Its totient is φ = 6771048.

The previous prime is 20313143. The next prime is 20313197. The reversal of 20313156 is 65131302.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 846370 + ... + 846393.

Almost surely, 2^20313156 is an apocalyptic number.

It is an amenable number.

20313156 is an abundant number, since it is smaller than the sum of its proper divisors (27084236).

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

20313156 is a wasteful number, since it uses less digits than its factorization.

20313156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1692770 (or 1692768 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 20313156 is about 4507.0118704082. The cubic root of 20313156 is about 272.8511579797.

Adding to 20313156 its reverse (65131302), we get a palindrome (85444458).

The spelling of 20313156 in words is "twenty million, three hundred thirteen thousand, one hundred fifty-six".