18904212 has 24 divisors (see below), whose sum is σ = 49011200. Its totient is φ = 6301368.

The previous prime is 18904211. The next prime is 18904253. The reversal of 18904212 is 21240981.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18904211) 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, 87412 + ... + 87627.

Almost surely, 2^18904212 is an apocalyptic number.

18904212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18904212 is an abundant number, since it is smaller than the sum of its proper divisors (30106988).

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

18904212 is a wasteful number, since it uses less digits than its factorization.

18904212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175052 (or 175044 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 18904212 is about 4347.8974228930. The cubic root of 18904212 is about 266.3909866279.

The spelling of 18904212 in words is "eighteen million, nine hundred four thousand, two hundred twelve".