21433132434 has 24 divisors (see below), whose sum is σ = 49864839408. Its totient is φ = 6123752040.

The previous prime is 21433132411. The next prime is 21433132453. The reversal of 21433132434 is 43423133412.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36450612 + ... + 36451199.

It is an arithmetic number, because the mean of its divisors is an integer number (2077701642).

Almost surely, 2^21433132434 is an apocalyptic number.

21433132434 is an abundant number, since it is smaller than the sum of its proper divisors (28431706974).

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

21433132434 is a wasteful number, since it uses less digits than its factorization.

21433132434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72901830 (or 72901823 counting only the distinct ones).

The product of its digits is 20736, while the sum is 30.

Adding to 21433132434 its reverse (43423133412), we get a palindrome (64856265846).

The spelling of 21433132434 in words is "twenty-one billion, four hundred thirty-three million, one hundred thirty-two thousand, four hundred thirty-four".