2173901868 has 48 divisors (see below), whose sum is σ = 5638738560. Its totient is φ = 724287312.

The previous prime is 2173901867. The next prime is 2173901869. The reversal of 2173901868 is 8681093712.

It is an interprime number because it is at equal distance from previous prime (2173901867) and next prime (2173901869).

It is not an unprimeable number, because it can be changed into a prime (2173901861) 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, 327955 + ... + 334517.

It is an arithmetic number, because the mean of its divisors is an integer number (117473720).

Almost surely, 2^2173901868 is an apocalyptic number.

It is an amenable number.

2173901868 is an abundant number, since it is smaller than the sum of its proper divisors (3464836692).

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

2173901868 is a wasteful number, since it uses less digits than its factorization.

2173901868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9643 (or 9635 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 2173901868 is about 46625.1205682087. The cubic root of 2173901868 is about 1295.4280955728.

The spelling of 2173901868 in words is "two billion, one hundred seventy-three million, nine hundred one thousand, eight hundred sixty-eight".