2113437620 has 72 divisors (see below), whose sum is σ = 5466564936. Its totient is φ = 681977856.

The previous prime is 2113437581. The next prime is 2113437629. The reversal of 2113437620 is 267343112.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1153553296 + 959884324 = 33964^2 + 30982^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113437629) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 46769 + ... + 80088.

It is an arithmetic number, because the mean of its divisors is an integer number (75924513).

Almost surely, 2^2113437620 is an apocalyptic number.

2113437620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2113437620 is an abundant number, since it is smaller than the sum of its proper divisors (3353127316).

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

2113437620 is a wasteful number, since it uses less digits than its factorization.

2113437620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126897 (or 126888 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 29.

The square root of 2113437620 is about 45972.1396065052. The cubic root of 2113437620 is about 1283.3047780607.

The spelling of 2113437620 in words is "two billion, one hundred thirteen million, four hundred thirty-seven thousand, six hundred twenty".