21723346050 has 96 divisors (see below), whose sum is σ = 61646054400. Its totient is φ = 4959216960.

The previous prime is 21723346049. The next prime is 21723346093. The reversal of 21723346050 is 5064332712.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 868621 + ... + 893279.

It is an arithmetic number, because the mean of its divisors is an integer number (642146400).

Almost surely, 2^21723346050 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21723346050, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30823027200).

21723346050 is an abundant number, since it is smaller than the sum of its proper divisors (39922708350).

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

21723346050 is a wasteful number, since it uses less digits than its factorization.

21723346050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25520 (or 25515 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 33.

Adding to 21723346050 its reverse (5064332712), we get a palindrome (26787678762).

The spelling of 21723346050 in words is "twenty-one billion, seven hundred twenty-three million, three hundred forty-six thousand, fifty".