18451960 has 16 divisors (see below), whose sum is σ = 41517000. Its totient is φ = 7380768.

The previous prime is 18451949. The next prime is 18451981. The reversal of 18451960 is 6915481.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 230610 + ... + 230689.

Almost surely, 2^18451960 is an apocalyptic number.

18451960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18451960 is an abundant number, since it is smaller than the sum of its proper divisors (23065040).

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

18451960 is a wasteful number, since it uses less digits than its factorization.

18451960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461310 (or 461306 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 18451960 is about 4295.5744668205. The cubic root of 18451960 is about 264.2494963065.

The spelling of 18451960 in words is "eighteen million, four hundred fifty-one thousand, nine hundred sixty".