18352566525381 has 16 divisors (see below), whose sum is σ = 26695799589888. Its totient is φ = 11122285353200.

The previous prime is 18352566525287. The next prime is 18352566525407.

18352566525381 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 18352566525381 - 2³⁷ = 18215127571909 is a prime.

It is a super-2 number, since 2×18352566525381² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18352566526381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11282535 + ... + 12806276.

It is an arithmetic number, because the mean of its divisors is an integer number (1668487474368).

Almost surely, 2^{18352566525381} is an apocalyptic number.

18352566525381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18352566525381 is a deficient number, since it is larger than the sum of its proper divisors (8343233064507).

18352566525381 is a wasteful number, since it uses less digits than its factorization.

18352566525381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24111912.

The product of its digits is 51840000, while the sum is 60.

The spelling of 18352566525381 in words is "eighteen trillion, three hundred fifty-two billion, five hundred sixty-six million, five hundred twenty-five thousand, three hundred eighty-one".