2056121920 has 28 divisors (see below), whose sum is σ = 4896141084. Its totient is φ = 822448640.

The previous prime is 2056121891. The next prime is 2056121923. The reversal of 2056121920 is 291216502.

It can be written as a sum of positive squares in 2 ways, for example, as 1601920576 + 454201344 = 40024^2 + 21312^2 .

It is not an unprimeable number, because it can be changed into a prime (2056121923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3212371 + ... + 3213010.

Almost surely, 2^2056121920 is an apocalyptic number.

2056121920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2056121920 is an abundant number, since it is smaller than the sum of its proper divisors (2840019164).

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

2056121920 is an equidigital number, since it uses as much as digits as its factorization.

2056121920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6425398 (or 6425388 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 2056121920 is about 45344.4805902549. The cubic root of 2056121920 is about 1271.5973700296.

The spelling of 2056121920 in words is "two billion, fifty-six million, one hundred twenty-one thousand, nine hundred twenty".