18563640382 has 32 divisors (see below), whose sum is σ = 33803827200. Its totient is φ = 7463748480.

The previous prime is 18563640349. The next prime is 18563640383. The reversal of 18563640382 is 28304636581.

It is a super-2 number, since 2×18563640382² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18563640383) 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, 51382 + ... + 199417.

It is an arithmetic number, because the mean of its divisors is an integer number (1056369600).

Almost surely, 2^18563640382 is an apocalyptic number.

18563640382 is a deficient number, since it is larger than the sum of its proper divisors (15240186818).

18563640382 is a wasteful number, since it uses less digits than its factorization.

18563640382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 251136.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 18563640382 in words is "eighteen billion, five hundred sixty-three million, six hundred forty thousand, three hundred eighty-two".