20192831 has 2 divisors, whose sum is σ = 20192832. Its totient is φ = 20192830.

The previous prime is 20192803. The next prime is 20192849. The reversal of 20192831 is 13829102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20192831 is a prime.

It is a super-2 number, since 2×20192831² = 815500847589122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20192831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20194831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10096415 + 10096416.

It is an arithmetic number, because the mean of its divisors is an integer number (10096416).

Almost surely, 2^20192831 is an apocalyptic number.

20192831 is a deficient number, since it is larger than the sum of its proper divisors (1).

20192831 is an equidigital number, since it uses as much as digits as its factorization.

20192831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 20192831 is about 4493.6433992919. The cubic root of 20192831 is about 272.3113460107.

The spelling of 20192831 in words is "twenty million, one hundred ninety-two thousand, eight hundred thirty-one".