2120900540 has 24 divisors (see below), whose sum is σ = 4858790832. Its totient is φ = 771236480.

The previous prime is 2120900539. The next prime is 2120900563. The reversal of 2120900540 is 450090212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4820009 + ... + 4820448.

It is an arithmetic number, because the mean of its divisors is an integer number (202449618).

Almost surely, 2^2120900540 is an apocalyptic number.

2120900540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2120900540 is an abundant number, since it is smaller than the sum of its proper divisors (2737890292).

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

2120900540 is a wasteful number, since it uses less digits than its factorization.

2120900540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9640477 (or 9640475 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2120900540 is about 46053.2359340796. The cubic root of 2120900540 is about 1284.8135285343.

Adding to 2120900540 its reverse (450090212), we get a palindrome (2570990752).

The spelling of 2120900540 in words is "two billion, one hundred twenty million, nine hundred thousand, five hundred forty".