18838684365 has 32 divisors (see below), whose sum is σ = 30876716160. Its totient is φ = 9804847104.

The previous prime is 18838684321. The next prime is 18838684369. The reversal of 18838684365 is 56348683881.

It is not a de Polignac number, because 18838684365 - 2⁶ = 18838684301 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18838684299 and 18838684308.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18838684369) 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, 43557 + ... + 198933.

It is an arithmetic number, because the mean of its divisors is an integer number (964897380).

Almost surely, 2^18838684365 is an apocalyptic number.

18838684365 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18838684365 is a deficient number, since it is larger than the sum of its proper divisors (12038031795).

18838684365 is a wasteful number, since it uses less digits than its factorization.

18838684365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155581.

The product of its digits is 26542080, while the sum is 60.

The spelling of 18838684365 in words is "eighteen billion, eight hundred thirty-eight million, six hundred eighty-four thousand, three hundred sixty-five".