18965212 has 18 divisors (see below), whose sum is σ = 37976568. Its totient is φ = 8118072.

The previous prime is 18965209. The next prime is 18965227. The reversal of 18965212 is 21256981.

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

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 5 ways as a sum of consecutive naturals, for example, 22633 + ... + 23455.

Almost surely, 2^18965212 is an apocalyptic number.

It is an amenable number.

18965212 is an abundant number, since it is smaller than the sum of its proper divisors (19011356).

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

18965212 is an frugal number, since it uses more digits than its factorization.

18965212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1657 (or 832 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The square root of 18965212 is about 4354.9066580123. The cubic root of 18965212 is about 266.6772086110.

The spelling of 18965212 in words is "eighteen million, nine hundred sixty-five thousand, two hundred twelve".