21244132032 has 28 divisors (see below), whose sum is σ = 56208433176. Its totient is φ = 7081377280.

The previous prime is 21244132003. The next prime is 21244132043. The reversal of 21244132032 is 23023144212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a junction number, because it is equal to n+sod(n) for n = 21244131993 and 21244132011.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55323069 + ... + 55323452.

It is an arithmetic number, because the mean of its divisors is an integer number (2007444042).

Almost surely, 2^21244132032 is an apocalyptic number.

It is an amenable number.

21244132032 is an abundant number, since it is smaller than the sum of its proper divisors (34964301144).

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

21244132032 is a wasteful number, since it uses less digits than its factorization.

21244132032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110646536 (or 110646526 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 21244132032 its reverse (23023144212), we get a palindrome (44267276244).

The spelling of 21244132032 in words is "twenty-one billion, two hundred forty-four million, one hundred thirty-two thousand, thirty-two".