21440324332120 has 32 divisors (see below), whose sum is σ = 50338152781920. Its totient is φ = 8203254526720.

The previous prime is 21440324332111. The next prime is 21440324332157. The reversal of 21440324332120 is 2123342304412.

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, 11652349261 + ... + 11652351100.

It is an arithmetic number, because the mean of its divisors is an integer number (1573067274435).

Almost surely, 2^{21440324332120} is an apocalyptic number.

21440324332120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21440324332120 is an abundant number, since it is smaller than the sum of its proper divisors (28897828449800).

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

21440324332120 is a wasteful number, since it uses less digits than its factorization.

21440324332120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23304700395 (or 23304700391 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 21440324332120 its reverse (2123342304412), we get a palindrome (23563666636532).

The spelling of 21440324332120 in words is "twenty-one trillion, four hundred forty billion, three hundred twenty-four million, three hundred thirty-two thousand, one hundred twenty".