21106913300 has 108 divisors (see below), whose sum is σ = 50439792480. Its totient is φ = 7660699200.

The previous prime is 21106913297. The next prime is 21106913341. The reversal of 21106913300 is 331960112.

It is a self number, because there is not a number n which added to its sum of digits gives 21106913300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7972577 + ... + 7975223.

Almost surely, 2^21106913300 is an apocalyptic number.

21106913300 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 21106913300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25219896240).

21106913300 is an abundant number, since it is smaller than the sum of its proper divisors (29332879180).

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

21106913300 is a wasteful number, since it uses less digits than its factorization.

21106913300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3342 (or 3324 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 26.

The spelling of 21106913300 in words is "twenty-one billion, one hundred six million, nine hundred thirteen thousand, three hundred".