21823375660 has 96 divisors (see below), whose sum is σ = 52268654592. Its totient is φ = 7605058560.

The previous prime is 21823375649. The next prime is 21823375663. The reversal of 21823375660 is 6657332812.

It is not an unprimeable number, because it can be changed into a prime (21823375663) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197409 + ... + 287431.

It is an arithmetic number, because the mean of its divisors is an integer number (544465152).

Almost surely, 2^21823375660 is an apocalyptic number.

21823375660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21823375660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26134327296).

21823375660 is an abundant number, since it is smaller than the sum of its proper divisors (30445278932).

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

21823375660 is a wasteful number, since it uses less digits than its factorization.

21823375660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90103 (or 90101 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 43.

The spelling of 21823375660 in words is "twenty-one billion, eight hundred twenty-three million, three hundred seventy-five thousand, six hundred sixty".