2056421340 has 72 divisors (see below), whose sum is σ = 6302172240. Its totient is φ = 542721024.

The previous prime is 2056421333. The next prime is 2056421377. The reversal of 2056421340 is 431246502.

2056421340 is a `hidden beast` number, since 2 + 0 + 5 + 642 + 13 + 4 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41430 + ... + 76349.

It is an arithmetic number, because the mean of its divisors is an integer number (87530170).

Almost surely, 2^2056421340 is an apocalyptic number.

2056421340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2056421340 is an abundant number, since it is smaller than the sum of its proper divisors (4245750900).

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

2056421340 is a wasteful number, since it uses less digits than its factorization.

2056421340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117891 (or 117886 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 2056421340 is about 45347.7820846841. The cubic root of 2056421340 is about 1271.6590919215.

Adding to 2056421340 its reverse (431246502), we get a palindrome (2487667842).

The spelling of 2056421340 in words is "two billion, fifty-six million, four hundred twenty-one thousand, three hundred forty".