18992412 has 36 divisors (see below), whose sum is σ = 49129080. Its totient is φ = 6183072.

The previous prime is 18992401. The next prime is 18992431. The reversal of 18992412 is 21429981.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4587 + ... + 7682.

Almost surely, 2^18992412 is an apocalyptic number.

18992412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18992412 is an abundant number, since it is smaller than the sum of its proper divisors (30136668).

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

18992412 is a wasteful number, since it uses less digits than its factorization.

18992412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12322 (or 12317 counting only the distinct ones).

The product of its digits is 10368, while the sum is 36.

The square root of 18992412 is about 4358.0284533261. The cubic root of 18992412 is about 266.8046376305.

The spelling of 18992412 in words is "eighteen million, nine hundred ninety-two thousand, four hundred twelve".