19935902131 has 2 divisors, whose sum is σ = 19935902132. Its totient is φ = 19935902130.

The previous prime is 19935902029. The next prime is 19935902167. The reversal of 19935902131 is 13120953991.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19935902131 - 2⁹ = 19935901619 is a prime.

It is a super-2 number, since 2×19935902131² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (19935908131) 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, 9967951065 + 9967951066.

It is an arithmetic number, because the mean of its divisors is an integer number (9967951066).

Almost surely, 2^19935902131 is an apocalyptic number.

19935902131 is a deficient number, since it is larger than the sum of its proper divisors (1).

19935902131 is an equidigital number, since it uses as much as digits as its factorization.

19935902131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 65610, while the sum is 43.

The spelling of 19935902131 in words is "nineteen billion, nine hundred thirty-five million, nine hundred two thousand, one hundred thirty-one".