18770918985 has 192 divisors, whose sum is σ = 43309873152. Its totient is φ = 7295090688.

The previous prime is 18770918981. The next prime is 18770918993. The reversal of 18770918985 is 58981907781.

It is not a de Polignac number, because 18770918985 - 2² = 18770918981 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (18770918981) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 3269037 + ... + 3274773.

It is an arithmetic number, because the mean of its divisors is an integer number (225572256).

Almost surely, 2^18770918985 is an apocalyptic number.

18770918985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18770918985 is an abundant number, since it is smaller than the sum of its proper divisors (24538954167).

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

18770918985 is a wasteful number, since it uses less digits than its factorization.

18770918985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5832 (or 5829 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 63.

The spelling of 18770918985 in words is "eighteen billion, seven hundred seventy million, nine hundred eighteen thousand, nine hundred eighty-five".