18039468 has 24 divisors (see below), whose sum is σ = 42670768. Its totient is φ = 5930496.

The previous prime is 18039449. The next prime is 18039491. The reversal of 18039468 is 86493081.

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, 9421 + ... + 11172.

Almost surely, 2^18039468 is an apocalyptic number.

It is an amenable number.

18039468 is an abundant number, since it is smaller than the sum of its proper divisors (24631300).

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

18039468 is a wasteful number, since it uses less digits than its factorization.

18039468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20673 (or 20671 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 18039468 is about 4247.2894886033. The cubic root of 18039468 is about 262.2655466681.

The spelling of 18039468 in words is "eighteen million, thirty-nine thousand, four hundred sixty-eight".