2126421860 has 24 divisors (see below), whose sum is σ = 4700512320. Its totient is φ = 805801824.

The previous prime is 2126421821. The next prime is 2126421887. The reversal of 2126421860 is 681246212.

It is a super-3 number, since 3×2126421860³ (a number of 29 digits) contains 333 as substring.

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, 2797544 + ... + 2798303.

It is an arithmetic number, because the mean of its divisors is an integer number (195854680).

Almost surely, 2^2126421860 is an apocalyptic number.

2126421860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2126421860 is an abundant number, since it is smaller than the sum of its proper divisors (2574090460).

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

2126421860 is a wasteful number, since it uses less digits than its factorization.

2126421860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5595875 (or 5595873 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 2126421860 is about 46113.1419445693. The cubic root of 2126421860 is about 1285.9274766877.

The spelling of 2126421860 in words is "two billion, one hundred twenty-six million, four hundred twenty-one thousand, eight hundred sixty".