18905412 has 24 divisors (see below), whose sum is σ = 45536512. Its totient is φ = 6098400.

The previous prime is 18905407. The next prime is 18905413. The reversal of 18905412 is 21450981.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 18905412.

It is not an unprimeable number, because it can be changed into a prime (18905413) 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, 25039 + ... + 25782.

Almost surely, 2^18905412 is an apocalyptic number.

18905412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18905412 is an abundant number, since it is smaller than the sum of its proper divisors (26631100).

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

18905412 is a wasteful number, since it uses less digits than its factorization.

18905412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50859 (or 50857 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 18905412 is about 4348.0354184390. The cubic root of 18905412 is about 266.3966231570.

The spelling of 18905412 in words is "eighteen million, nine hundred five thousand, four hundred twelve".