18634768 has 30 divisors (see below), whose sum is σ = 36823722. Its totient is φ = 9135360.

The previous prime is 18634753. The next prime is 18634769. The reversal of 18634768 is 86743681.

It can be written as a sum of positive squares in 3 ways, for example, as 5326864 + 13307904 = 2308^2 + 3648^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18634769) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 59380 + ... + 59692.

Almost surely, 2^18634768 is an apocalyptic number.

It is an amenable number.

18634768 is a deficient number, since it is larger than the sum of its proper divisors (18188954).

18634768 is an equidigital number, since it uses as much as digits as its factorization.

18634768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443 (or 376 counting only the distinct ones).

The product of its digits is 193536, while the sum is 43.

The square root of 18634768 is about 4316.8006671608. The cubic root of 18634768 is about 265.1192912549.

The spelling of 18634768 in words is "eighteen million, six hundred thirty-four thousand, seven hundred sixty-eight".