18867011564 has 12 divisors (see below), whose sum is σ = 33036334464. Its totient is φ = 9428058864.

The previous prime is 18867011561. The next prime is 18867011593. The reversal of 18867011564 is 46511076881.

It is a happy number.

It is a super-2 number, since 2×18867011564² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18867011561) 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, 1353932 + ... + 1367795.

It is an arithmetic number, because the mean of its divisors is an integer number (2753027872).

Almost surely, 2^18867011564 is an apocalyptic number.

It is an amenable number.

18867011564 is a deficient number, since it is larger than the sum of its proper divisors (14169322900).

18867011564 is a wasteful number, since it uses less digits than its factorization.

18867011564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723464 (or 2723462 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 47.

The spelling of 18867011564 in words is "eighteen billion, eight hundred sixty-seven million, eleven thousand, five hundred sixty-four".