19713976531 has 2 divisors, whose sum is σ = 19713976532. Its totient is φ = 19713976530.

The previous prime is 19713976459. The next prime is 19713976609. The reversal of 19713976531 is 13567931791.

It is a weak prime.

It is an emirp because it is prime and its reverse (13567931791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19713976531 - 2⁹ = 19713976019 is a prime.

It is a super-2 number, since 2×19713976531² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19713946531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9856988265 + 9856988266.

It is an arithmetic number, because the mean of its divisors is an integer number (9856988266).

Almost surely, 2^19713976531 is an apocalyptic number.

19713976531 is a deficient number, since it is larger than the sum of its proper divisors (1).

19713976531 is an equidigital number, since it uses as much as digits as its factorization.

19713976531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1071630, while the sum is 52.

The spelling of 19713976531 in words is "nineteen billion, seven hundred thirteen million, nine hundred seventy-six thousand, five hundred thirty-one".