2051361620 has 96 divisors (see below), whose sum is σ = 5383445760. Its totient is φ = 637885440.

The previous prime is 2051361601. The next prime is 2051361629. The reversal of 2051361620 is 261631502.

It is a self number, because there is not a number n which added to its sum of digits gives 2051361620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051361629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 782552 + ... + 785168.

It is an arithmetic number, because the mean of its divisors is an integer number (56077560).

Almost surely, 2^2051361620 is an apocalyptic number.

2051361620 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 2051361620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2691722880).

2051361620 is an abundant number, since it is smaller than the sum of its proper divisors (3332084140).

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

2051361620 is a wasteful number, since it uses less digits than its factorization.

2051361620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3153 (or 3151 counting only the distinct ones).

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

The square root of 2051361620 is about 45291.9597721273. The cubic root of 2051361620 is about 1270.6152845591.

The spelling of 2051361620 in words is "two billion, fifty-one million, three hundred sixty-one thousand, six hundred twenty".