18632486738381 has 4 divisors (see below), whose sum is σ = 18779199232512. Its totient is φ = 18485774244252.

The previous prime is 18632486738363. The next prime is 18632486738389. The reversal of 18632486738381 is 18383768423681.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18632486738381 - 2¹⁸ = 18632486476237 is a prime.

It is a super-2 number, since 2×18632486738381² (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 (18632486738389) 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, 73356246875 + ... + 73356247128.

It is an arithmetic number, because the mean of its divisors is an integer number (4694799808128).

Almost surely, 2^{18632486738381} is an apocalyptic number.

It is an amenable number.

18632486738381 is a deficient number, since it is larger than the sum of its proper divisors (146712494131).

18632486738381 is a wasteful number, since it uses less digits than its factorization.

18632486738381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146712494130.

The product of its digits is 222953472, while the sum is 68.

The spelling of 18632486738381 in words is "eighteen trillion, six hundred thirty-two billion, four hundred eighty-six million, seven hundred thirty-eight thousand, three hundred eighty-one".