18669963642 has 32 divisors (see below), whose sum is σ = 40771892160. Its totient is φ = 5652366720.

The previous prime is 18669963551. The next prime is 18669963677. The reversal of 18669963642 is 24636996681.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57267 + ... + 201542.

It is an arithmetic number, because the mean of its divisors is an integer number (1274121630).

Almost surely, 2^18669963642 is an apocalyptic number.

18669963642 is an abundant number, since it is smaller than the sum of its proper divisors (22101928518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18669963642 is a wasteful number, since it uses less digits than its factorization.

18669963642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259918.

The product of its digits is 20155392, while the sum is 60.

The spelling of 18669963642 in words is "eighteen billion, six hundred sixty-nine million, nine hundred sixty-three thousand, six hundred forty-two".