18745647860 has 24 divisors (see below), whose sum is σ = 39368716800. Its totient is φ = 7497715104.

The previous prime is 18745647853. The next prime is 18745647913. The reversal of 18745647860 is 6874654781.

It is a happy number.

It is a super-2 number, since 2×18745647860² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18745647796 and 18745647805.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 359741 + ... + 408539.

It is an arithmetic number, because the mean of its divisors is an integer number (1640363200).

Almost surely, 2^18745647860 is an apocalyptic number.

18745647860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18745647860 is an abundant number, since it is smaller than the sum of its proper divisors (20623068940).

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

18745647860 is a wasteful number, since it uses less digits than its factorization.

18745647860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68015 (or 68013 counting only the distinct ones).

The product of its (nonzero) digits is 9031680, while the sum is 56.

The spelling of 18745647860 in words is "eighteen billion, seven hundred forty-five million, six hundred forty-seven thousand, eight hundred sixty".