18720535074 has 8 divisors (see below), whose sum is σ = 37441070160. Its totient is φ = 6240178356.

The previous prime is 18720535051. The next prime is 18720535081. The reversal of 18720535074 is 47053502781.

It is a sphenic number, since it is the product of 3 distinct primes.

18720535074 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1560044584 + ... + 1560044595.

It is an arithmetic number, because the mean of its divisors is an integer number (4680133770).

Almost surely, 2^18720535074 is an apocalyptic number.

18720535074 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18720535074 is a wasteful number, since it uses less digits than its factorization.

18720535074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120089184.

The product of its (nonzero) digits is 235200, while the sum is 42.

The spelling of 18720535074 in words is "eighteen billion, seven hundred twenty million, five hundred thirty-five thousand, seventy-four".