19937235139 has 2 divisors, whose sum is σ = 19937235140. Its totient is φ = 19937235138.

The previous prime is 19937235119. The next prime is 19937235151. The reversal of 19937235139 is 93153273991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19937235139 - 2⁷ = 19937235011 is a prime.

It is not a weakly prime, because it can be changed into another prime (19937235119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9968617569 + 9968617570.

It is an arithmetic number, because the mean of its divisors is an integer number (9968617570).

Almost surely, 2^19937235139 is an apocalyptic number.

19937235139 is a deficient number, since it is larger than the sum of its proper divisors (1).

19937235139 is an equidigital number, since it uses as much as digits as its factorization.

19937235139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1377810, while the sum is 52.

The spelling of 19937235139 in words is "nineteen billion, nine hundred thirty-seven million, two hundred thirty-five thousand, one hundred thirty-nine".