2120340856 has 16 divisors (see below), whose sum is σ = 3990313440. Its totient is φ = 1056257280.

The previous prime is 2120340839. The next prime is 2120340863. The reversal of 2120340856 is 6580430212.

It is a super-3 number, since 3×2120340856³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 486841 + ... + 491176.

It is an arithmetic number, because the mean of its divisors is an integer number (249394590).

Almost surely, 2^2120340856 is an apocalyptic number.

It is an amenable number.

2120340856 is a deficient number, since it is larger than the sum of its proper divisors (1869972584).

2120340856 is a wasteful number, since it uses less digits than its factorization.

2120340856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 978294 (or 978290 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2120340856 is about 46047.1590437456. The cubic root of 2120340856 is about 1284.7005022004.

The spelling of 2120340856 in words is "two billion, one hundred twenty million, three hundred forty thousand, eight hundred fifty-six".