21294837032 has 64 divisors (see below), whose sum is σ = 46910689920. Its totient is φ = 8871061248.

The previous prime is 21294837023. The next prime is 21294837097. The reversal of 21294837032 is 23073849212.

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, 2405318 + ... + 2414154.

It is an arithmetic number, because the mean of its divisors is an integer number (732979530).

Almost surely, 2^21294837032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21294837032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23455344960).

21294837032 is an abundant number, since it is smaller than the sum of its proper divisors (25615852888).

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

21294837032 is a wasteful number, since it uses less digits than its factorization.

21294837032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10050 (or 10046 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 41.

The spelling of 21294837032 in words is "twenty-one billion, two hundred ninety-four million, eight hundred thirty-seven thousand, thirty-two".