18267220073536 has 42 divisors (see below), whose sum is σ = 42167221344078. Its totient is φ = 7828808601600.

The previous prime is 18267220073527. The next prime is 18267220073551. The reversal of 18267220073536 is 63537002276281.

It can be written as a sum of positive squares in only one way, i.e., 16023048294400 + 2244171779136 = 4002880^2 + 1498056^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2912500065 + ... + 2912506336.

Almost surely, 2^{18267220073536} is an apocalyptic number.

18267220073536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18267220073536 is an abundant number, since it is smaller than the sum of its proper divisors (23900001270542).

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

18267220073536 is an equidigital number, since it uses as much as digits as its factorization.

18267220073536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5825006427 (or 5825006410 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 52.

The spelling of 18267220073536 in words is "eighteen trillion, two hundred sixty-seven billion, two hundred twenty million, seventy-three thousand, five hundred thirty-six".