20792931 has 4 divisors (see below), whose sum is σ = 27723912. Its totient is φ = 13861952.

The previous prime is 20792899. The next prime is 20792939. The reversal of 20792931 is 13929702.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20792931 - 2⁵ = 20792899 is a prime.

It is a super-2 number, since 2×20792931² = 864691959141522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20792892 and 20792901.

It is not an unprimeable number, because it can be changed into a prime (20792939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3465486 + ... + 3465491.

It is an arithmetic number, because the mean of its divisors is an integer number (6930978).

Almost surely, 2^20792931 is an apocalyptic number.

20792931 is a deficient number, since it is larger than the sum of its proper divisors (6930981).

20792931 is an equidigital number, since it uses as much as digits as its factorization.

20792931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6930980.

The product of its (nonzero) digits is 6804, while the sum is 33.

The square root of 20792931 is about 4559.9266441468. The cubic root of 20792931 is about 274.9826148789.

The spelling of 20792931 in words is "twenty million, seven hundred ninety-two thousand, nine hundred thirty-one".