19291092913 has 2 divisors, whose sum is σ = 19291092914. Its totient is φ = 19291092912.

The previous prime is 19291092859. The next prime is 19291092923. The reversal of 19291092913 is 31929019291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11158119424 + 8132973489 = 105632^2 + 90183^2 .

It is a cyclic number.

It is not a de Polignac number, because 19291092913 - 2¹³ = 19291084721 is a prime.

It is not a weakly prime, because it can be changed into another prime (19291092923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9645546456 + 9645546457.

It is an arithmetic number, because the mean of its divisors is an integer number (9645546457).

Almost surely, 2^19291092913 is an apocalyptic number.

It is an amenable number.

19291092913 is a deficient number, since it is larger than the sum of its proper divisors (1).

19291092913 is an equidigital number, since it uses as much as digits as its factorization.

19291092913 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 46.

The spelling of 19291092913 in words is "nineteen billion, two hundred ninety-one million, ninety-two thousand, nine hundred thirteen".