21244236532 has 12 divisors (see below), whose sum is σ = 37263675456. Its totient is φ = 10597472120.

The previous prime is 21244236527. The next prime is 21244236539. The reversal of 21244236532 is 23563244212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21244236539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6159598 + ... + 6163045.

It is an arithmetic number, because the mean of its divisors is an integer number (3105306288).

Almost surely, 2^21244236532 is an apocalyptic number.

It is an amenable number.

21244236532 is a deficient number, since it is larger than the sum of its proper divisors (16019438924).

21244236532 is a wasteful number, since it uses less digits than its factorization.

21244236532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12323078 (or 12323076 counting only the distinct ones).

The product of its digits is 69120, while the sum is 34.

The spelling of 21244236532 in words is "twenty-one billion, two hundred forty-four million, two hundred thirty-six thousand, five hundred thirty-two".