19158942831 has 32 divisors (see below), whose sum is σ = 29418275328. Its totient is φ = 10864264320.

The previous prime is 19158942827. The next prime is 19158942893. The reversal of 19158942831 is 13824985191.

It is not a de Polignac number, because 19158942831 - 2² = 19158942827 is a prime.

It is a super-2 number, since 2×19158942831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19158942821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2907961 + ... + 2914541.

It is an arithmetic number, because the mean of its divisors is an integer number (919321104).

Almost surely, 2^19158942831 is an apocalyptic number.

19158942831 is a deficient number, since it is larger than the sum of its proper divisors (10259332497).

19158942831 is a wasteful number, since it uses less digits than its factorization.

19158942831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7631.

The product of its digits is 622080, while the sum is 51.

The spelling of 19158942831 in words is "nineteen billion, one hundred fifty-eight million, nine hundred forty-two thousand, eight hundred thirty-one".