18533225436 has 48 divisors (see below), whose sum is σ = 47186012160. Its totient is φ = 5614875520.

The previous prime is 18533225383. The next prime is 18533225467. The reversal of 18533225436 is 63452233581.

It is a congruent number.

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, 702085 + ... + 728003.

It is an arithmetic number, because the mean of its divisors is an integer number (983041920).

Almost surely, 2^18533225436 is an apocalyptic number.

It is an amenable number.

18533225436 is an abundant number, since it is smaller than the sum of its proper divisors (28652786724).

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

18533225436 is a wasteful number, since it uses less digits than its factorization.

18533225436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31354 (or 31352 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The spelling of 18533225436 in words is "eighteen billion, five hundred thirty-three million, two hundred twenty-five thousand, four hundred thirty-six".