18106664402 has 54 divisors (see below), whose sum is σ = 30036437613. Its totient is φ = 8184336384.

The previous prime is 18106664393. The next prime is 18106664423. The reversal of 18106664402 is 20446660181.

It can be written as a sum of positive squares in 14 ways, for example, as 43573201 + 18063091201 = 6601^2 + 134399^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=95149.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 93816818 + ... + 93817010.

Almost surely, 2^18106664402 is an apocalyptic number.

18106664402 is a deficient number, since it is larger than the sum of its proper divisors (11929773211).

18106664402 is an equidigital number, since it uses as much as digits as its factorization.

18106664402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480 (or 241 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The spelling of 18106664402 in words is "eighteen billion, one hundred six million, six hundred sixty-four thousand, four hundred two".