18917074242 has 48 divisors (see below), whose sum is σ = 44878204800. Its totient is φ = 5711277600.

The previous prime is 18917074229. The next prime is 18917074271. The reversal of 18917074242 is 24247071981.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 122617 + ... + 229932.

It is an arithmetic number, because the mean of its divisors is an integer number (934962600).

Almost surely, 2^18917074242 is an apocalyptic number.

18917074242 is an abundant number, since it is smaller than the sum of its proper divisors (25961130558).

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

18917074242 is a wasteful number, since it uses less digits than its factorization.

18917074242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352839 (or 352836 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The spelling of 18917074242 in words is "eighteen billion, nine hundred seventeen million, seventy-four thousand, two hundred forty-two".