21124303032 has 64 divisors (see below), whose sum is σ = 61639326720. Its totient is φ = 5907097728.

The previous prime is 21124303009. The next prime is 21124303043. The reversal of 21124303032 is 23030342112.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1329763 + ... + 1345554.

It is an arithmetic number, because the mean of its divisors is an integer number (963114480).

Almost surely, 2^21124303032 is an apocalyptic number.

It is an amenable number.

21124303032 is an abundant number, since it is smaller than the sum of its proper divisors (40515023688).

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

21124303032 is a wasteful number, since it uses less digits than its factorization.

21124303032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2675380 (or 2675376 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21124303032 its reverse (23030342112), we get a palindrome (44154645144).

The spelling of 21124303032 in words is "twenty-one billion, one hundred twenty-four million, three hundred three thousand, thirty-two".