2100207718685 has 16 divisors (see below), whose sum is σ = 2534455915200. Its totient is φ = 1670696015616.

The previous prime is 2100207718681. The next prime is 2100207718709. The reversal of 2100207718685 is 5868177020012.

It is a cyclic number.

It is not a de Polignac number, because 2100207718685 - 2² = 2100207718681 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100207718681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22737926 + ... + 22830104.

It is an arithmetic number, because the mean of its divisors is an integer number (158403494700).

Almost surely, 2^{2100207718685} is an apocalyptic number.

It is an amenable number.

2100207718685 is a deficient number, since it is larger than the sum of its proper divisors (434248196515).

2100207718685 is a wasteful number, since it uses less digits than its factorization.

2100207718685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117820.

The product of its (nonzero) digits is 376320, while the sum is 47.

The spelling of 2100207718685 in words is "two trillion, one hundred billion, two hundred seven million, seven hundred eighteen thousand, six hundred eighty-five".