18189954 has 32 divisors (see below), whose sum is σ = 42552000. Its totient is φ = 5743872.

The previous prime is 18189947. The next prime is 18189961. The reversal of 18189954 is 45998181.

It is an interprime number because it is at equal distance from previous prime (18189947) and next prime (18189961).

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, 7839 + ... + 9890.

It is an arithmetic number, because the mean of its divisors is an integer number (1329750).

Almost surely, 2^18189954 is an apocalyptic number.

18189954 is an abundant number, since it is smaller than the sum of its proper divisors (24362046).

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

18189954 is a wasteful number, since it uses less digits than its factorization.

18189954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17759 (or 17753 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 18189954 is about 4264.9682296589. The cubic root of 18189954 is about 262.9928048652.

The spelling of 18189954 in words is "eighteen million, one hundred eighty-nine thousand, nine hundred fifty-four".