2121626040 has 64 divisors (see below), whose sum is σ = 6484989600. Its totient is φ = 555090432.

The previous prime is 2121626021. The next prime is 2121626069. The reversal of 2121626040 is 406261212.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 2121626040.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160435 + ... + 173154.

Almost surely, 2^2121626040 is an apocalyptic number.

2121626040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2121626040 is an abundant number, since it is smaller than the sum of its proper divisors (4363363560).

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

2121626040 is a wasteful number, since it uses less digits than its factorization.

2121626040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333656 (or 333652 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 2121626040 is about 46061.1120143663. The cubic root of 2121626040 is about 1284.9600112715.

Adding to 2121626040 its reverse (406261212), we get a palindrome (2527887252).

The spelling of 2121626040 in words is "two billion, one hundred twenty-one million, six hundred twenty-six thousand, forty".