18237012 has 12 divisors (see below), whose sum is σ = 42553056. Its totient is φ = 6079000.

The previous prime is 18237007. The next prime is 18237013. The reversal of 18237012 is 21073281.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18237013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 759864 + ... + 759887.

It is an arithmetic number, because the mean of its divisors is an integer number (3546088).

Almost surely, 2^18237012 is an apocalyptic number.

18237012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18237012 is an abundant number, since it is smaller than the sum of its proper divisors (24316044).

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

18237012 is a wasteful number, since it uses less digits than its factorization.

18237012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1519758 (or 1519756 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 18237012 is about 4270.4814716844. The cubic root of 18237012 is about 263.2193998752.

The spelling of 18237012 in words is "eighteen million, two hundred thirty-seven thousand, twelve".