2123857580 has 24 divisors (see below), whose sum is σ = 4803186192. Its totient is φ = 784193472.

The previous prime is 2123857579. The next prime is 2123857613. The reversal of 2123857580 is 857583212.

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, 4084082 + ... + 4084601.

It is an arithmetic number, because the mean of its divisors is an integer number (200132758).

Almost surely, 2^2123857580 is an apocalyptic number.

2123857580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2123857580 is an abundant number, since it is smaller than the sum of its proper divisors (2679328612).

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

2123857580 is a wasteful number, since it uses less digits than its factorization.

2123857580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8168705 (or 8168703 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 41.

The square root of 2123857580 is about 46085.3293359177. The cubic root of 2123857580 is about 1285.4103631661.

The spelling of 2123857580 in words is "two billion, one hundred twenty-three million, eight hundred fifty-seven thousand, five hundred eighty".