21440331022140 has 72 divisors (see below), whose sum is σ = 65319669455040. Its totient is φ = 5692454688384.

The previous prime is 21440331022087. The next prime is 21440331022141. The reversal of 21440331022140 is 4122013304412.

21440331022140 is a `hidden beast` number, since 2 + 1 + 4 + 403 + 31 + 0 + 221 + 4 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21440331022141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 260030724 + ... + 260113163.

It is an arithmetic number, because the mean of its divisors is an integer number (907217631320).

Almost surely, 2^{21440331022140} is an apocalyptic number.

21440331022140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21440331022140 is an abundant number, since it is smaller than the sum of its proper divisors (43879338432900).

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

21440331022140 is a wasteful number, since it uses less digits than its factorization.

21440331022140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 520144131 (or 520144126 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

Adding to 21440331022140 its reverse (4122013304412), we get a palindrome (25562344326552).

The spelling of 21440331022140 in words is "twenty-one trillion, four hundred forty billion, three hundred thirty-one million, twenty-two thousand, one hundred forty".