18659880216 has 48 divisors (see below), whose sum is σ = 51612444000. Its totient is φ = 6087619392.

The previous prime is 18659880199. The next prime is 18659880227. The reversal of 18659880216 is 61208895681.

It is a happy number.

It is a super-2 number, since 2×18659880216² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2753691 + ... + 2760458.

It is an arithmetic number, because the mean of its divisors is an integer number (1075259250).

Almost surely, 2^18659880216 is an apocalyptic number.

It is an amenable number.

18659880216 is an abundant number, since it is smaller than the sum of its proper divisors (32952563784).

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

18659880216 is a wasteful number, since it uses less digits than its factorization.

18659880216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5514208 (or 5514201 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 54.

The spelling of 18659880216 in words is "eighteen billion, six hundred fifty-nine million, eight hundred eighty thousand, two hundred sixteen".