20100017985 has 8 divisors (see below), whose sum is σ = 32160028800. Its totient is φ = 10720009584.

The previous prime is 20100017957. The next prime is 20100018041. The reversal of 20100017985 is 58971000102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20100017985 - 2⁶ = 20100017921 is a prime.

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, 670000585 + ... + 670000614.

It is an arithmetic number, because the mean of its divisors is an integer number (4020003600).

Almost surely, 2^20100017985 is an apocalyptic number.

It is an amenable number.

20100017985 is a deficient number, since it is larger than the sum of its proper divisors (12060010815).

20100017985 is a wasteful number, since it uses less digits than its factorization.

20100017985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1340001207.

The product of its (nonzero) digits is 5040, while the sum is 33.

The spelling of 20100017985 in words is "twenty billion, one hundred million, seventeen thousand, nine hundred eighty-five".