21295620600 has 96 divisors (see below), whose sum is σ = 66453901440. Its totient is φ = 5641200000.

The previous prime is 21295620589. The next prime is 21295620637. The reversal of 21295620600 is 602659212.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26926 + ... + 208125.

It is an arithmetic number, because the mean of its divisors is an integer number (692228140).

Almost surely, 2^21295620600 is an apocalyptic number.

21295620600 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 21295620600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33226950720).

21295620600 is an abundant number, since it is smaller than the sum of its proper divisors (45158280840).

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

21295620600 is a wasteful number, since it uses less digits than its factorization.

21295620600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 235221 (or 235212 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The spelling of 21295620600 in words is "twenty-one billion, two hundred ninety-five million, six hundred twenty thousand, six hundred".