2126645620 has 24 divisors (see below), whose sum is σ = 4871952288. Its totient is φ = 773325600.

The previous prime is 2126645611. The next prime is 2126645627. The reversal of 2126645620 is 265466212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126645627) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4833066 + ... + 4833505.

It is an arithmetic number, because the mean of its divisors is an integer number (202998012).

Almost surely, 2^2126645620 is an apocalyptic number.

2126645620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2126645620 is an abundant number, since it is smaller than the sum of its proper divisors (2745306668).

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

2126645620 is a wasteful number, since it uses less digits than its factorization.

2126645620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9666591 (or 9666589 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 2126645620 is about 46115.5680871438. The cubic root of 2126645620 is about 1285.9725804754.

It can be divided in two parts, 2126 and 645620, that added together give a palindrome (647746).

The spelling of 2126645620 in words is "two billion, one hundred twenty-six million, six hundred forty-five thousand, six hundred twenty".