21433024420 has 48 divisors (see below), whose sum is σ = 45329735808. Its totient is φ = 8512358400.

The previous prime is 21433024369. The next prime is 21433024489. The reversal of 21433024420 is 2442033412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2106345 + ... + 2116495.

It is an arithmetic number, because the mean of its divisors is an integer number (944369496).

Almost surely, 2^21433024420 is an apocalyptic number.

21433024420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21433024420 is an abundant number, since it is smaller than the sum of its proper divisors (23896711388).

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

21433024420 is a wasteful number, since it uses less digits than its factorization.

21433024420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10900 (or 10898 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21433024420 its reverse (2442033412), we get a palindrome (23875057832).

The spelling of 21433024420 in words is "twenty-one billion, four hundred thirty-three million, twenty-four thousand, four hundred twenty".