21429537024 has 144 divisors (see below), whose sum is σ = 65696841728. Its totient is φ = 6074320896.

The previous prime is 21429536993. The next prime is 21429537043. The reversal of 21429537024 is 42073592412.

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, 667059 + ... + 698445.

Almost surely, 2^21429537024 is an apocalyptic number.

21429537024 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21429537024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32848420864).

21429537024 is an abundant number, since it is smaller than the sum of its proper divisors (44267304704).

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

21429537024 is a wasteful number, since it uses less digits than its factorization.

21429537024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31540 (or 31526 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 39.

The spelling of 21429537024 in words is "twenty-one billion, four hundred twenty-nine million, five hundred thirty-seven thousand, twenty-four".