21332402144 has 24 divisors (see below), whose sum is σ = 42015652560. Its totient is φ = 10661760256.

The previous prime is 21332402071. The next prime is 21332402167. The reversal of 21332402144 is 44120423312.

It is a congruent number.

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, 60029 + ... + 215100.

It is an arithmetic number, because the mean of its divisors is an integer number (1750652190).

Almost surely, 2^21332402144 is an apocalyptic number.

It is an amenable number.

21332402144 is a deficient number, since it is larger than the sum of its proper divisors (20683250416).

21332402144 is a wasteful number, since it uses less digits than its factorization.

21332402144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277562 (or 277554 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 21332402144 its reverse (44120423312), we get a palindrome (65452825456).

The spelling of 21332402144 in words is "twenty-one billion, three hundred thirty-two million, four hundred two thousand, one hundred forty-four".