19051312639 has 2 divisors, whose sum is σ = 19051312640. Its totient is φ = 19051312638.

The previous prime is 19051312627. The next prime is 19051312649. The reversal of 19051312639 is 93621315091.

It is a strong prime.

It is an emirp because it is prime and its reverse (93621315091) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19051312639 - 2²³ = 19042924031 is a prime.

It is a super-2 number, since 2×19051312639² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19051312649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9525656319 + 9525656320.

It is an arithmetic number, because the mean of its divisors is an integer number (9525656320).

Almost surely, 2^19051312639 is an apocalyptic number.

19051312639 is a deficient number, since it is larger than the sum of its proper divisors (1).

19051312639 is an equidigital number, since it uses as much as digits as its factorization.

19051312639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 43740, while the sum is 40.

The spelling of 19051312639 in words is "nineteen billion, fifty-one million, three hundred twelve thousand, six hundred thirty-nine".