21115250300 has 36 divisors (see below), whose sum is σ = 45926498016. Its totient is φ = 8426486400.

The previous prime is 21115250287. The next prime is 21115250311. The reversal of 21115250300 is 305251112.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 201857 + ... + 288056.

It is an arithmetic number, because the mean of its divisors is an integer number (1275736056).

Almost surely, 2^21115250300 is an apocalyptic number.

21115250300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21115250300 is an abundant number, since it is smaller than the sum of its proper divisors (24811247716).

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

21115250300 is a wasteful number, since it uses less digits than its factorization.

21115250300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490358 (or 490351 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The spelling of 21115250300 in words is "twenty-one billion, one hundred fifteen million, two hundred fifty thousand, three hundred".