18874847212 has 24 divisors (see below), whose sum is σ = 35592665472. Its totient is φ = 8706364800.

The previous prime is 18874847203. The next prime is 18874847221. The reversal of 18874847212 is 21274847881.

It is an interprime number because it is at equal distance from previous prime (18874847203) and next prime (18874847221).

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a self number, because there is not a number n which added to its sum of digits gives 18874847212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15964 + ... + 194947.

It is an arithmetic number, because the mean of its divisors is an integer number (1483027728).

Almost surely, 2^18874847212 is an apocalyptic number.

It is an amenable number.

18874847212 is a deficient number, since it is larger than the sum of its proper divisors (16717818260).

18874847212 is a wasteful number, since it uses less digits than its factorization.

18874847212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212649 (or 212647 counting only the distinct ones).

The product of its digits is 1605632, while the sum is 52.

The spelling of 18874847212 in words is "eighteen billion, eight hundred seventy-four million, eight hundred forty-seven thousand, two hundred twelve".