21686482300 has 144 divisors (see below), whose sum is σ = 54707679040. Its totient is φ = 7308195840.

The previous prime is 21686482243. The next prime is 21686482303. The reversal of 21686482300 is 328468612.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21686482303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20286166 + ... + 20287234.

Almost surely, 2^21686482300 is an apocalyptic number.

21686482300 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 21686482300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27353839520).

21686482300 is an abundant number, since it is smaller than the sum of its proper divisors (33021196740).

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

21686482300 is a wasteful number, since it uses less digits than its factorization.

21686482300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560 (or 1553 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 40.

The spelling of 21686482300 in words is "twenty-one billion, six hundred eighty-six million, four hundred eighty-two thousand, three hundred".