18568967824 has 135 divisors (see below), whose sum is σ = 41993880579. Its totient is φ = 7947149760.

The previous prime is 18568967803. The next prime is 18568967831. The reversal of 18568967824 is 42876986581.

It is a happy number.

The square root of 18568967824 is 136268.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 113919967 + ... + 113920129.

Almost surely, 2^18568967824 is an apocalyptic number.

18568967824 is the 136268-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18568967824

18568967824 is an abundant number, since it is smaller than the sum of its proper divisors (23424912755).

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

18568967824 is a wasteful number, since it uses less digits than its factorization.

18568967824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 195 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 64.

Multiplying 18568967824 by its sum of digits (64), we get a square (1188413940736 = 1090144²).

The spelling of 18568967824 in words is "eighteen billion, five hundred sixty-eight million, nine hundred sixty-seven thousand, eight hundred twenty-four".