21317606700 has 288 divisors, whose sum is σ = 71418762240. Its totient is φ = 4864665600.

The previous prime is 21317606663. The next prime is 21317606701. The reversal of 21317606700 is 760671312.

It is not an unprimeable number, because it can be changed into a prime (21317606701) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 3479640 + ... + 3485760.

Almost surely, 2^21317606700 is an apocalyptic number.

21317606700 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 21317606700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35709381120).

21317606700 is an abundant number, since it is smaller than the sum of its proper divisors (50101155540).

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

21317606700 is a wasteful number, since it uses less digits than its factorization.

21317606700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6217 (or 6210 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 33.

The spelling of 21317606700 in words is "twenty-one billion, three hundred seventeen million, six hundred six thousand, seven hundred".