21228990300 has 576 divisors, whose sum is σ = 80855936000. Its totient is φ = 4835194560.

The previous prime is 21228990283. The next prime is 21228990331. The reversal of 21228990300 is 309982212.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 191 ways as a sum of consecutive naturals, for example, 75013959 + ... + 75014241.

Almost surely, 2^21228990300 is an apocalyptic number.

21228990300 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 21228990300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40427968000).

21228990300 is an abundant number, since it is smaller than the sum of its proper divisors (59626945700).

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

21228990300 is an equidigital number, since it uses as much as digits as its factorization.

21228990300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 300 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The spelling of 21228990300 in words is "twenty-one billion, two hundred twenty-eight million, nine hundred ninety thousand, three hundred".