18919203406842 has 32 divisors (see below), whose sum is σ = 38890828952640. Its totient is φ = 6133320673920.

The previous prime is 18919203406823. The next prime is 18919203406973. The reversal of 18919203406842 is 24860430291981.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 290370868 + ... + 290436015.

It is an arithmetic number, because the mean of its divisors is an integer number (1215338404770).

Almost surely, 2^{18919203406842} is an apocalyptic number.

18919203406842 is an abundant number, since it is smaller than the sum of its proper divisors (19971625545798).

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

18919203406842 is a wasteful number, since it uses less digits than its factorization.

18919203406842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580807038.

The product of its (nonzero) digits is 5971968, while the sum is 57.

The spelling of 18919203406842 in words is "eighteen trillion, nine hundred nineteen billion, two hundred three million, four hundred six thousand, eight hundred forty-two".