18474897152 has 72 divisors (see below), whose sum is σ = 41102182800. Its totient is φ = 8236449792.

The previous prime is 18474897143. The next prime is 18474897163. The reversal of 18474897152 is 25179847481.

It is a super-2 number, since 2×18474897152² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (56) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 29027 + ... + 194402.

It is an arithmetic number, because the mean of its divisors is an integer number (570863650).

Almost surely, 2^18474897152 is an apocalyptic number.

It is an amenable number.

18474897152 is an abundant number, since it is smaller than the sum of its proper divisors (22627285648).

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

18474897152 is a wasteful number, since it uses less digits than its factorization.

18474897152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223481 (or 223467 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 56.

The spelling of 18474897152 in words is "eighteen billion, four hundred seventy-four million, eight hundred ninety-seven thousand, one hundred fifty-two".