18542812 has 6 divisors (see below), whose sum is σ = 32449928. Its totient is φ = 9271404.

The previous prime is 18542791. The next prime is 18542819. The reversal of 18542812 is 21824581.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18542819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2317848 + ... + 2317855.

Almost surely, 2^18542812 is an apocalyptic number.

It is an amenable number.

18542812 is a deficient number, since it is larger than the sum of its proper divisors (13907116).

18542812 is a wasteful number, since it uses less digits than its factorization.

18542812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635707 (or 4635705 counting only the distinct ones).

The product of its digits is 5120, while the sum is 31.

The square root of 18542812 is about 4306.1365514809. The cubic root of 18542812 is about 264.6824819363.

The spelling of 18542812 in words is "eighteen million, five hundred forty-two thousand, eight hundred twelve".