2101173690 has 64 divisors (see below), whose sum is σ = 6287155200. Its totient is φ = 436607040.

The previous prime is 2101173689. The next prime is 2101173709. The reversal of 2101173690 is 963711012.

It is a super-2 number, since 2×2101173690² = 8829861751096432200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 452490 + ... + 457109.

It is an arithmetic number, because the mean of its divisors is an integer number (98236800).

Almost surely, 2^2101173690 is an apocalyptic number.

2101173690 is an abundant number, since it is smaller than the sum of its proper divisors (4185981510).

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

2101173690 is a wasteful number, since it uses less digits than its factorization.

2101173690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909627.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 2101173690 is about 45838.5611685184. The cubic root of 2101173690 is about 1280.8176924538.

The spelling of 2101173690 in words is "two billion, one hundred one million, one hundred seventy-three thousand, six hundred ninety".