18413938927 has 4 divisors (see below), whose sum is σ = 18596255256. Its totient is φ = 18231622600.

The previous prime is 18413938913. The next prime is 18413938957. The reversal of 18413938927 is 72983931481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18413938927 - 2²⁷ = 18279721199 is a prime.

It is a super-2 number, since 2×18413938927² (a number of 21 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 (18413938957) 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, 91158013 + ... + 91158214.

It is an arithmetic number, because the mean of its divisors is an integer number (4649063814).

Almost surely, 2^18413938927 is an apocalyptic number.

18413938927 is a deficient number, since it is larger than the sum of its proper divisors (182316329).

18413938927 is a wasteful number, since it uses less digits than its factorization.

18413938927 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182316328.

The product of its digits is 2612736, while the sum is 55.

The spelling of 18413938927 in words is "eighteen billion, four hundred thirteen million, nine hundred thirty-eight thousand, nine hundred twenty-seven".