18018948 has 24 divisors (see below), whose sum is σ = 42638400. Its totient is φ = 5921440.

The previous prime is 18018943. The next prime is 18018953. The reversal of 18018948 is 84981081.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18018943) and next prime (18018953).

It is not an unprimeable number, because it can be changed into a prime (18018941) 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, 9723 + ... + 11426.

It is an arithmetic number, because the mean of its divisors is an integer number (1776600).

Almost surely, 2^18018948 is an apocalyptic number.

It is an amenable number.

18018948 is an abundant number, since it is smaller than the sum of its proper divisors (24619452).

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

18018948 is a wasteful number, since it uses less digits than its factorization.

18018948 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21227 (or 21225 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 39.

The square root of 18018948 is about 4244.8731429808. The cubic root of 18018948 is about 262.1660660760.

The spelling of 18018948 in words is "eighteen million, eighteen thousand, nine hundred forty-eight".