21576424534 has 16 divisors (see below), whose sum is σ = 37094148000. Its totient is φ = 9220541184.

The previous prime is 21576424517. The next prime is 21576424547. The reversal of 21576424534 is 43542467512.

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, 2203099 + ... + 2212870.

It is an arithmetic number, because the mean of its divisors is an integer number (2318384250).

Almost surely, 2^21576424534 is an apocalyptic number.

21576424534 is a deficient number, since it is larger than the sum of its proper divisors (15517723466).

21576424534 is a wasteful number, since it uses less digits than its factorization.

21576424534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4416327.

The product of its digits is 806400, while the sum is 43.

The spelling of 21576424534 in words is "twenty-one billion, five hundred seventy-six million, four hundred twenty-four thousand, five hundred thirty-four".