18353870020555 has 16 divisors (see below), whose sum is σ = 22565429849088. Its totient is φ = 14322686400000.

The previous prime is 18353870020543. The next prime is 18353870020597. The reversal of 18353870020555 is 55502007835381.

It is not a de Polignac number, because 18353870020555 - 2¹⁵ = 18353869987787 is a prime.

It is a super-2 number, since 2×18353870020555² (a number of 27 digits) contains 22 as substring.

It is a Duffinian 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, 5852946 + ... + 8424055.

It is an arithmetic number, because the mean of its divisors is an integer number (1410339365568).

Almost surely, 2^{18353870020555} is an apocalyptic number.

18353870020555 is a deficient number, since it is larger than the sum of its proper divisors (4211559828533).

18353870020555 is a wasteful number, since it uses less digits than its factorization.

18353870020555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14283318.

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

The spelling of 18353870020555 in words is "eighteen trillion, three hundred fifty-three billion, eight hundred seventy million, twenty thousand, five hundred fifty-five".