2121504432 has 40 divisors (see below), whose sum is σ = 5769005760. Its totient is φ = 669948480.

The previous prime is 2121504403. The next prime is 2121504457. The reversal of 2121504432 is 2344051212.

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

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, 1162194 + ... + 1164017.

It is an arithmetic number, because the mean of its divisors is an integer number (144225144).

Almost surely, 2^2121504432 is an apocalyptic number.

It is an amenable number.

2121504432 is an abundant number, since it is smaller than the sum of its proper divisors (3647501328).

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

2121504432 is a wasteful number, since it uses less digits than its factorization.

2121504432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326241 (or 2326235 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2121504432 is about 46059.7919231079. The cubic root of 2121504432 is about 1284.9354602276.

Adding to 2121504432 its reverse (2344051212), we get a palindrome (4465555644).

The spelling of 2121504432 in words is "two billion, one hundred twenty-one million, five hundred four thousand, four hundred thirty-two".