18866325892 has 12 divisors (see below), whose sum is σ = 34958192220. Its totient is φ = 8878270976.

The previous prime is 18866325887. The next prime is 18866325893. The reversal of 18866325892 is 29852366881.

It can be written as a sum of positive squares in 2 ways, for example, as 12368998656 + 6497327236 = 111216^2 + 80606^2 .

It is not an unprimeable number, because it can be changed into a prime (18866325893) 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, 138722917 + ... + 138723052.

It is an arithmetic number, because the mean of its divisors is an integer number (2913182685).

Almost surely, 2^18866325892 is an apocalyptic number.

It is an amenable number.

18866325892 is a deficient number, since it is larger than the sum of its proper divisors (16091866328).

18866325892 is a wasteful number, since it uses less digits than its factorization.

18866325892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277445990 (or 277445988 counting only the distinct ones).

The product of its digits is 9953280, while the sum is 58.

The spelling of 18866325892 in words is "eighteen billion, eight hundred sixty-six million, three hundred twenty-five thousand, eight hundred ninety-two".