18253504388 has 24 divisors (see below), whose sum is σ = 37051893312. Its totient is φ = 7706169504.

The previous prime is 18253504369. The next prime is 18253504391. The reversal of 18253504388 is 88340535281.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

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, 4863131 + ... + 4866882.

It is an arithmetic number, because the mean of its divisors is an integer number (1543828888).

Almost surely, 2^18253504388 is an apocalyptic number.

It is an amenable number.

18253504388 is an abundant number, since it is smaller than the sum of its proper divisors (18798388924).

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

18253504388 is a wasteful number, since it uses less digits than its factorization.

18253504388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9730091 (or 9730089 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 47.

The spelling of 18253504388 in words is "eighteen billion, two hundred fifty-three million, five hundred four thousand, three hundred eighty-eight".