18212474544 has 80 divisors (see below), whose sum is σ = 54345271680. Its totient is φ = 5194286080.

The previous prime is 18212474521. The next prime is 18212474551. The reversal of 18212474544 is 44547421281.

It is a junction number, because it is equal to n+sod(n) for n = 18212474496 and 18212474505.

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, 1005534 + ... + 1023485.

It is an arithmetic number, because the mean of its divisors is an integer number (679315896).

Almost surely, 2^18212474544 is an apocalyptic number.

It is an amenable number.

18212474544 is an abundant number, since it is smaller than the sum of its proper divisors (36132797136).

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

18212474544 is a wasteful number, since it uses less digits than its factorization.

18212474544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029058 (or 2029052 counting only the distinct ones).

The product of its digits is 286720, while the sum is 42.

The spelling of 18212474544 in words is "eighteen billion, two hundred twelve million, four hundred seventy-four thousand, five hundred forty-four".