19135640442 has 64 divisors (see below), whose sum is σ = 40285808640. Its totient is φ = 6053249664.

The previous prime is 19135640423. The next prime is 19135640467. The reversal of 19135640442 is 24404653191.

It is a self number, because there is not a number n which added to its sum of digits gives 19135640442.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1679838 + ... + 1691190.

It is an arithmetic number, because the mean of its divisors is an integer number (629465760).

Almost surely, 2^19135640442 is an apocalyptic number.

19135640442 is an abundant number, since it is smaller than the sum of its proper divisors (21150168198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19135640442 is a wasteful number, since it uses less digits than its factorization.

19135640442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11587.

The product of its (nonzero) digits is 103680, while the sum is 39.

The spelling of 19135640442 in words is "nineteen billion, one hundred thirty-five million, six hundred forty thousand, four hundred forty-two".