18953017660 has 24 divisors (see below), whose sum is σ = 40153566096. Its totient is φ = 7514115840.

The previous prime is 18953017597. The next prime is 18953017711. The reversal of 18953017660 is 6671035981.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 18953017660.

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, 4190886 + ... + 4195405.

It is an arithmetic number, because the mean of its divisors is an integer number (1673065254).

Almost surely, 2^18953017660 is an apocalyptic number.

18953017660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18953017660 is an abundant number, since it is smaller than the sum of its proper divisors (21200548436).

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

18953017660 is a wasteful number, since it uses less digits than its factorization.

18953017660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8386413 (or 8386411 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The spelling of 18953017660 in words is "eighteen billion, nine hundred fifty-three million, seventeen thousand, six hundred sixty".