21683883700 has 36 divisors (see below), whose sum is σ = 47065004140. Its totient is φ = 8671530240.

The previous prime is 21683883671. The next prime is 21683883709. The reversal of 21683883700 is 738838612.

It can be written as a sum of positive squares in 6 ways, for example, as 640899856 + 21042983844 = 25316^2 + 145062^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21683883709) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 449974 + ... + 495826.

Almost surely, 2^21683883700 is an apocalyptic number.

21683883700 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21683883700 is an abundant number, since it is smaller than the sum of its proper divisors (25381120440).

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

21683883700 is a wasteful number, since it uses less digits than its factorization.

21683883700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50596 (or 50589 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 21683883700 in words is "twenty-one billion, six hundred eighty-three million, eight hundred eighty-three thousand, seven hundred".