2126420220 has 24 divisors (see below), whose sum is σ = 5953976784. Its totient is φ = 567045376.

The previous prime is 2126420209. The next prime is 2126420221. The reversal of 2126420220 is 220246212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2126420221) 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, 17720109 + ... + 17720228.

It is an arithmetic number, because the mean of its divisors is an integer number (248082366).

Almost surely, 2^2126420220 is an apocalyptic number.

2126420220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2126420220 is an abundant number, since it is smaller than the sum of its proper divisors (3827556564).

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

2126420220 is a wasteful number, since it uses less digits than its factorization.

2126420220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35440349 (or 35440347 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 2126420220 is about 46113.1241622166. The cubic root of 2126420220 is about 1285.9271460977.

Adding to 2126420220 its reverse (220246212), we get a palindrome (2346666432).

The spelling of 2126420220 in words is "two billion, one hundred twenty-six million, four hundred twenty thousand, two hundred twenty".