21726604700 has 36 divisors (see below), whose sum is σ = 47160028440. Its totient is φ = 8688191040.

The previous prime is 21726604699. The next prime is 21726604703. The reversal of 21726604700 is 740662712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21726604703) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 349154 + ... + 406646.

It is an arithmetic number, because the mean of its divisors is an integer number (1310000790).

Almost surely, 2^21726604700 is an apocalyptic number.

21726604700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21726604700 is an abundant number, since it is smaller than the sum of its proper divisors (25433423740).

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

21726604700 is a wasteful number, since it uses less digits than its factorization.

21726604700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61286 (or 61279 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The spelling of 21726604700 in words is "twenty-one billion, seven hundred twenty-six million, six hundred four thousand, seven hundred".