18955018 has 16 divisors (see below), whose sum is σ = 29060640. Its totient is φ = 9270000.

The previous prime is 18955007. The next prime is 18955019. The reversal of 18955018 is 81055981.

It is not an unprimeable number, because it can be changed into a prime (18955019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30313 + ... + 30931.

It is an arithmetic number, because the mean of its divisors is an integer number (1816290).

Almost surely, 2^18955018 is an apocalyptic number.

18955018 is a deficient number, since it is larger than the sum of its proper divisors (10105622).

18955018 is a wasteful number, since it uses less digits than its factorization.

18955018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 933.

The product of its (nonzero) digits is 14400, while the sum is 37.

The square root of 18955018 is about 4353.7360967335. The cubic root of 18955018 is about 266.6294194504.

The spelling of 18955018 in words is "eighteen million, nine hundred fifty-five thousand, eighteen".