19892371139 has 2 divisors, whose sum is σ = 19892371140. Its totient is φ = 19892371138.

The previous prime is 19892371117. The next prime is 19892371153. The reversal of 19892371139 is 93117329891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19892371139 - 2¹² = 19892367043 is a prime.

It is not a weakly prime, because it can be changed into another prime (19892371159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9946185569 + 9946185570.

It is an arithmetic number, because the mean of its divisors is an integer number (9946185570).

Almost surely, 2^19892371139 is an apocalyptic number.

19892371139 is a deficient number, since it is larger than the sum of its proper divisors (1).

19892371139 is an equidigital number, since it uses as much as digits as its factorization.

19892371139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 53.

The spelling of 19892371139 in words is "nineteen billion, eight hundred ninety-two million, three hundred seventy-one thousand, one hundred thirty-nine".