21336986100 has 144 divisors (see below), whose sum is σ = 63505810368. Its totient is φ = 5527157760.

The previous prime is 21336986053. The next prime is 21336986117. The reversal of 21336986100 is 168963312.

It is a congruent number.

It is an unprimeable number.

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, 9511579 + ... + 9513821.

It is an arithmetic number, because the mean of its divisors is an integer number (441012572).

Almost surely, 2^21336986100 is an apocalyptic number.

21336986100 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 21336986100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31752905184).

21336986100 is an abundant number, since it is smaller than the sum of its proper divisors (42168824268).

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

21336986100 is a wasteful number, since it uses less digits than its factorization.

21336986100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154 (or 3147 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The spelling of 21336986100 in words is "twenty-one billion, three hundred thirty-six million, nine hundred eighty-six thousand, one hundred".