18636512 has 12 divisors (see below), whose sum is σ = 36690696. Its totient is φ = 9318240.

The previous prime is 18636481. The next prime is 18636517. The reversal of 18636512 is 21563681.

It is a happy number.

It is a super-2 number, since 2×18636512² = 694639159052288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 582391 = 18636512 / (1 + 8 + 6 + 3 + 6 + 5 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18636517) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 291164 + ... + 291227.

It is an arithmetic number, because the mean of its divisors is an integer number (3057558).

Almost surely, 2^18636512 is an apocalyptic number.

It is an amenable number.

18636512 is a deficient number, since it is larger than the sum of its proper divisors (18054184).

18636512 is an equidigital number, since it uses as much as digits as its factorization.

18636512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582401 (or 582393 counting only the distinct ones).

The product of its digits is 8640, while the sum is 32.

The square root of 18636512 is about 4317.0026638861. The cubic root of 18636512 is about 265.1275617026.

The spelling of 18636512 in words is "eighteen million, six hundred thirty-six thousand, five hundred twelve".