18659169216 has 84 divisors (see below), whose sum is σ = 53607943584. Its totient is φ = 6205209600.

The previous prime is 18659169211. The next prime is 18659169223. The reversal of 18659169216 is 61296195681.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18659169211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 210676 + ... + 285836.

Almost surely, 2^18659169216 is an apocalyptic number.

18659169216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18659169216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26803971792).

18659169216 is an abundant number, since it is smaller than the sum of its proper divisors (34948774368).

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

18659169216 is a wasteful number, since it uses less digits than its factorization.

18659169216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75610 (or 75597 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 54.

The spelling of 18659169216 in words is "eighteen billion, six hundred fifty-nine million, one hundred sixty-nine thousand, two hundred sixteen".