19264779931 has 2 divisors, whose sum is σ = 19264779932. Its totient is φ = 19264779930.

The previous prime is 19264779929. The next prime is 19264779949. The reversal of 19264779931 is 13997746291.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19264779931 - 2¹ = 19264779929 is a prime.

It is a super-2 number, since 2×19264779931² (a number of 21 digits) contains 22 as substring.

Together with 19264779929, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (19264779901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9632389965 + 9632389966.

It is an arithmetic number, because the mean of its divisors is an integer number (9632389966).

Almost surely, 2^19264779931 is an apocalyptic number.

19264779931 is a deficient number, since it is larger than the sum of its proper divisors (1).

19264779931 is an equidigital number, since it uses as much as digits as its factorization.

19264779931 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5143824, while the sum is 58.

The spelling of 19264779931 in words is "nineteen billion, two hundred sixty-four million, seven hundred seventy-nine thousand, nine hundred thirty-one".