21883365644 has 24 divisors (see below), whose sum is σ = 43772016288. Its totient is φ = 9377452800.

The previous prime is 21883365641. The next prime is 21883365649. The reversal of 21883365644 is 44656338812.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21883365592 and 21883365601.

It is not an unprimeable number, because it can be changed into a prime (21883365641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214244 + ... + 299444.

It is an arithmetic number, because the mean of its divisors is an integer number (1823834012).

Almost surely, 2^21883365644 is an apocalyptic number.

It is an amenable number.

21883365644 is an abundant number, since it is smaller than the sum of its proper divisors (21888650644).

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

21883365644 is a wasteful number, since it uses less digits than its factorization.

21883365644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94385 (or 94383 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 50.

The spelling of 21883365644 in words is "twenty-one billion, eight hundred eighty-three million, three hundred sixty-five thousand, six hundred forty-four".