21440112232 has 32 divisors (see below), whose sum is σ = 50119744320. Its totient is φ = 8353290240.

The previous prime is 21440112209. The next prime is 21440112257. The reversal of 21440112232 is 23221104412.

It is a Harshad number since it is a multiple of its sum of digits (22).

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, 17402073 + ... + 17403304.

It is an arithmetic number, because the mean of its divisors is an integer number (1566242010).

Almost surely, 2^21440112232 is an apocalyptic number.

21440112232 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21440112232 is an abundant number, since it is smaller than the sum of its proper divisors (28679632088).

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

21440112232 is a wasteful number, since it uses less digits than its factorization.

21440112232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34805401 (or 34805397 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21440112232 its reverse (23221104412), we get a palindrome (44661216644).

The spelling of 21440112232 in words is "twenty-one billion, four hundred forty million, one hundred twelve thousand, two hundred thirty-two".