102100019985 has 24 divisors (see below), whose sum is σ = 177549852480. Its totient is φ = 54275964192.

The previous prime is 102100019977. The next prime is 102100020017. The reversal of 102100019985 is 589910001201.

It is not a de Polignac number, because 102100019985 - 2³ = 102100019977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3681445 + ... + 3709074.

It is an arithmetic number, because the mean of its divisors is an integer number (7397910520).

Almost surely, 2^102100019985 is an apocalyptic number.

102100019985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

102100019985 is a deficient number, since it is larger than the sum of its proper divisors (75449832495).

102100019985 is a wasteful number, since it uses less digits than its factorization.

102100019985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7390837 (or 7390834 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 36.

The spelling of 102100019985 in words is "one hundred two billion, one hundred million, nineteen thousand, nine hundred eighty-five".