21444032302 has 16 divisors (see below), whose sum is σ = 40103125632. Its totient is φ = 8354817720.

The previous prime is 21444032231. The next prime is 21444032327. The reversal of 21444032302 is 20323044412.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69623328 + ... + 69623635.

It is an arithmetic number, because the mean of its divisors is an integer number (2506445352).

Almost surely, 2^21444032302 is an apocalyptic number.

21444032302 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21444032302 is a deficient number, since it is larger than the sum of its proper divisors (18659093330).

21444032302 is a wasteful number, since it uses less digits than its factorization.

21444032302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139246983.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 21444032302 its reverse (20323044412), we get a palindrome (41767076714).

The spelling of 21444032302 in words is "twenty-one billion, four hundred forty-four million, thirty-two thousand, three hundred two".