2051430920 has 128 divisors (see below), whose sum is σ = 5828198400. Its totient is φ = 631238400.

The previous prime is 2051430917. The next prime is 2051430929. The reversal of 2051430920 is 290341502.

It is a self number, because there is not a number n which added to its sum of digits gives 2051430920.

It is not an unprimeable number, because it can be changed into a prime (2051430929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 239105 + ... + 247535.

It is an arithmetic number, because the mean of its divisors is an integer number (45532800).

Almost surely, 2^2051430920 is an apocalyptic number.

2051430920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2051430920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2914099200).

2051430920 is an abundant number, since it is smaller than the sum of its proper divisors (3776767480).

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

2051430920 is a wasteful number, since it uses less digits than its factorization.

2051430920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8539 (or 8535 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2051430920 is about 45292.7248021136. The cubic root of 2051430920 is about 1270.6295925593.

The spelling of 2051430920 in words is "two billion, fifty-one million, four hundred thirty thousand, nine hundred twenty".