18023533865400 has 96 divisors (see below), whose sum is σ = 63854805709440. Its totient is φ = 4119664882560.

The previous prime is 18023533865353. The next prime is 18023533865459. The reversal of 18023533865400 is 456833532081.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18023533865400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2145654594 + ... + 2145662993.

It is an arithmetic number, because the mean of its divisors is an integer number (665154226140).

Almost surely, 2^{18023533865400} is an apocalyptic number.

18023533865400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18023533865400 is an abundant number, since it is smaller than the sum of its proper divisors (45831271844040).

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

18023533865400 is a wasteful number, since it uses less digits than its factorization.

18023533865400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291317613 (or 4291317604 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 48.

The spelling of 18023533865400 in words is "eighteen trillion, twenty-three billion, five hundred thirty-three million, eight hundred sixty-five thousand, four hundred".