18888360018953 has 4 divisors (see below), whose sum is σ = 19244744170308. Its totient is φ = 18531975867600.

The previous prime is 18888360018949. The next prime is 18888360018959. The reversal of 18888360018953 is 35981006388881.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12412571829904 + 6475788189049 = 3523148^2 + 2544757^2 .

It is a cyclic number.

It is not a de Polignac number, because 18888360018953 - 2² = 18888360018949 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18888360018959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178192075598 + ... + 178192075703.

It is an arithmetic number, because the mean of its divisors is an integer number (4811186042577).

Almost surely, 2^{18888360018953} is an apocalyptic number.

It is an amenable number.

18888360018953 is a deficient number, since it is larger than the sum of its proper divisors (356384151355).

18888360018953 is an equidigital number, since it uses as much as digits as its factorization.

18888360018953 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356384151354.

The product of its (nonzero) digits is 79626240, while the sum is 68.

The spelling of 18888360018953 in words is "eighteen trillion, eight hundred eighty-eight billion, three hundred sixty million, eighteen thousand, nine hundred fifty-three".