18999242634 has 16 divisors (see below), whose sum is σ = 38621412000. Its totient is φ = 6229259760.

The previous prime is 18999242629. The next prime is 18999242659. The reversal of 18999242634 is 43624299981.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25954884 + ... + 25955615.

It is an arithmetic number, because the mean of its divisors is an integer number (2413838250).

Almost surely, 2^18999242634 is an apocalyptic number.

18999242634 is an abundant number, since it is smaller than the sum of its proper divisors (19622169366).

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

18999242634 is a wasteful number, since it uses less digits than its factorization.

18999242634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51910565.

The product of its digits is 6718464, while the sum is 57.

The spelling of 18999242634 in words is "eighteen billion, nine hundred ninety-nine million, two hundred forty-two thousand, six hundred thirty-four".