21700514600 has 96 divisors (see below), whose sum is σ = 52287724800. Its totient is φ = 8366899200.

The previous prime is 21700514599. The next prime is 21700514609. The reversal of 21700514600 is 641500712.

It is a self number, because there is not a number n which added to its sum of digits gives 21700514600.

It is not an unprimeable number, because it can be changed into a prime (21700514609) 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, 1586591 + ... + 1600209.

It is an arithmetic number, because the mean of its divisors is an integer number (544663800).

Almost surely, 2^21700514600 is an apocalyptic number.

21700514600 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 21700514600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26143862400).

21700514600 is an abundant number, since it is smaller than the sum of its proper divisors (30587210200).

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

21700514600 is a wasteful number, since it uses less digits than its factorization.

21700514600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13923 (or 13914 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 26.

The spelling of 21700514600 in words is "twenty-one billion, seven hundred million, five hundred fourteen thousand, six hundred".