18463912 has 8 divisors (see below), whose sum is σ = 34619850. Its totient is φ = 9231952.

The previous prime is 18463909. The next prime is 18463919. The reversal of 18463912 is 21936481.

It can be written as a sum of positive squares in only one way, i.e., 11249316 + 7214596 = 3354^2 + 2686^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (18463919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1153987 + ... + 1154002.

Almost surely, 2^18463912 is an apocalyptic number.

It is an amenable number.

18463912 is a deficient number, since it is larger than the sum of its proper divisors (16155938).

18463912 is a wasteful number, since it uses less digits than its factorization.

18463912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2307995 (or 2307991 counting only the distinct ones).

The product of its digits is 10368, while the sum is 34.

The square root of 18463912 is about 4296.9654408664. The cubic root of 18463912 is about 264.3065386353.

The spelling of 18463912 in words is "eighteen million, four hundred sixty-three thousand, nine hundred twelve".