18240386552 has 16 divisors (see below), whose sum is σ = 34461801000. Its totient is φ = 9050572960.

The previous prime is 18240386543. The next prime is 18240386573. The reversal of 18240386552 is 25568304281.

It is a congruent 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, 8701427 + ... + 8703522.

Almost surely, 2^18240386552 is an apocalyptic number.

It is an amenable number.

18240386552 is a deficient number, since it is larger than the sum of its proper divisors (16221414448).

18240386552 is a wasteful number, since it uses less digits than its factorization.

18240386552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17405086 (or 17405082 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 44.

The spelling of 18240386552 in words is "eighteen billion, two hundred forty million, three hundred eighty-six thousand, five hundred fifty-two".