18555762053221 has 8 divisors (see below), whose sum is σ = 18811623254144. Its totient is φ = 18299946060000.

The previous prime is 18555762053201. The next prime is 18555762053233. The reversal of 18555762053221 is 12235026755581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18555762053221 - 2⁷ = 18555762053093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18555762053201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10474941 + ... + 12117586.

It is an arithmetic number, because the mean of its divisors is an integer number (2351452906768).

Almost surely, 2^{18555762053221} is an apocalyptic number.

It is an amenable number.

18555762053221 is a deficient number, since it is larger than the sum of its proper divisors (255861200923).

18555762053221 is a wasteful number, since it uses less digits than its factorization.

18555762053221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22603851.

The product of its (nonzero) digits is 5040000, while the sum is 52.

The spelling of 18555762053221 in words is "eighteen trillion, five hundred fifty-five billion, seven hundred sixty-two million, fifty-three thousand, two hundred twenty-one".