18945460 has 24 divisors (see below), whose sum is σ = 39868416. Its totient is φ = 7562400.

The previous prime is 18945449. The next prime is 18945461. The reversal of 18945460 is 6454981.

It is a happy number.

It is a super-2 number, since 2×18945460² = 717860909223200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18945461) 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, 15885 + ... + 17035.

It is an arithmetic number, because the mean of its divisors is an integer number (1661184).

Almost surely, 2^18945460 is an apocalyptic number.

18945460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18945460 is an abundant number, since it is smaller than the sum of its proper divisors (20922956).

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

18945460 is a wasteful number, since it uses less digits than its factorization.

18945460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1983 (or 1981 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 18945460 is about 4352.6382803996. The cubic root of 18945460 is about 266.5845962721.

The spelling of 18945460 in words is "eighteen million, nine hundred forty-five thousand, four hundred sixty".