18258189680 has 40 divisors (see below), whose sum is σ = 42457474512. Its totient is φ = 7302040064.

The previous prime is 18258189673. The next prime is 18258189739. The reversal of 18258189680 is 8698185281.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×18258189680² (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 7 ways as a sum of consecutive naturals, for example, 566972 + ... + 598308.

Almost surely, 2^18258189680 is an apocalyptic number.

18258189680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18258189680 is an abundant number, since it is smaller than the sum of its proper divisors (24199284832).

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

18258189680 is a wasteful number, since it uses less digits than its factorization.

18258189680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38633 (or 38627 counting only the distinct ones).

The product of its (nonzero) digits is 2211840, while the sum is 56.

The spelling of 18258189680 in words is "eighteen billion, two hundred fifty-eight million, one hundred eighty-nine thousand, six hundred eighty".