18655720442534 has 32 divisors (see below), whose sum is σ = 32226203116800. Its totient is φ = 7934069913120.

The previous prime is 18655720442501. The next prime is 18655720442581. The reversal of 18655720442534 is 43524402755681.

It is a self number, because there is not a number n which added to its sum of digits gives 18655720442534.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85775777 + ... + 85992995.

It is an arithmetic number, because the mean of its divisors is an integer number (1007068847400).

Almost surely, 2^{18655720442534} is an apocalyptic number.

18655720442534 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

18655720442534 is a deficient number, since it is larger than the sum of its proper divisors (13570482674266).

18655720442534 is a wasteful number, since it uses less digits than its factorization.

18655720442534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264188.

The product of its (nonzero) digits is 32256000, while the sum is 56.

The spelling of 18655720442534 in words is "eighteen trillion, six hundred fifty-five billion, seven hundred twenty million, four hundred forty-two thousand, five hundred thirty-four".