21226604600 has 96 divisors (see below), whose sum is σ = 52314977520. Its totient is φ = 7982008320.

The previous prime is 21226604593. The next prime is 21226604603. The reversal of 21226604600 is 640662212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21226604603) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3441119 + ... + 3447281.

Almost surely, 2^21226604600 is an apocalyptic number.

21226604600 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 21226604600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26157488760).

21226604600 is an abundant number, since it is smaller than the sum of its proper divisors (31088372920).

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

21226604600 is a wasteful number, since it uses less digits than its factorization.

21226604600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7209 (or 7200 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 21226604600 in words is "twenty-one billion, two hundred twenty-six million, six hundred four thousand, six hundred".