20679031 has 2 divisors, whose sum is σ = 20679032. Its totient is φ = 20679030.

The previous prime is 20679023. The next prime is 20679037. The reversal of 20679031 is 13097602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20679031 - 2³ = 20679023 is a prime.

It is a super-2 number, since 2×20679031² = 855244646197922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20679037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10339515 + 10339516.

It is an arithmetic number, because the mean of its divisors is an integer number (10339516).

Almost surely, 2^20679031 is an apocalyptic number.

20679031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20679031 is an equidigital number, since it uses as much as digits as its factorization.

20679031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 20679031 is about 4547.4202576846. The cubic root of 20679031 is about 274.4795932200.

The spelling of 20679031 in words is "twenty million, six hundred seventy-nine thousand, thirty-one".