18353266235381 has 32 divisors (see below), whose sum is σ = 23544559547136. Its totient is φ = 13892486400000.

The previous prime is 18353266235357. The next prime is 18353266235401.

18353266235381 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 18353266235381 - 2³⁸ = 18078388328437 is a prime.

It is a super-2 number, since 2×18353266235381² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18353266235341) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21851420 + ... + 22675781.

It is an arithmetic number, because the mean of its divisors is an integer number (735767485848).

Almost surely, 2^{18353266235381} is an apocalyptic number.

18353266235381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18353266235381 is a deficient number, since it is larger than the sum of its proper divisors (5191293311755).

18353266235381 is a wasteful number, since it uses less digits than its factorization.

18353266235381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44527373.

The product of its digits is 18662400, while the sum is 56.

The spelling of 18353266235381 in words is "eighteen trillion, three hundred fifty-three billion, two hundred sixty-six million, two hundred thirty-five thousand, three hundred eighty-one".