18689293467424 has 24 divisors (see below), whose sum is σ = 36811976560128. Its totient is φ = 9340220055360.

The previous prime is 18689293467413. The next prime is 18689293467431. The reversal of 18689293467424 is 42476439298681.

It is a super-2 number, since 2×18689293467424² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 138265092 + ... + 138400195.

It is an arithmetic number, because the mean of its divisors is an integer number (1533832356672).

Almost surely, 2^{18689293467424} is an apocalyptic number.

It is an amenable number.

18689293467424 is a deficient number, since it is larger than the sum of its proper divisors (18122683092704).

18689293467424 is a wasteful number, since it uses less digits than its factorization.

18689293467424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276667408 (or 276667400 counting only the distinct ones).

The product of its digits is 1003290624, while the sum is 73.

The spelling of 18689293467424 in words is "eighteen trillion, six hundred eighty-nine billion, two hundred ninety-three million, four hundred sixty-seven thousand, four hundred twenty-four".