18501968 has 20 divisors (see below), whose sum is σ = 35944128. Its totient is φ = 9226080.

The previous prime is 18501937. The next prime is 18502013. The reversal of 18501968 is 86910581.

It is a super-3 number, since 3×18501968³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5555 + ... + 8237.

Almost surely, 2^18501968 is an apocalyptic number.

It is an amenable number.

18501968 is a deficient number, since it is larger than the sum of its proper divisors (17442160).

18501968 is a wasteful number, since it uses less digits than its factorization.

18501968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3122 (or 3116 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 18501968 is about 4301.3914027905. The cubic root of 18501968 is about 264.4880015712.

The spelling of 18501968 in words is "eighteen million, five hundred one thousand, nine hundred sixty-eight".