21036563200 has 108 divisors (see below), whose sum is σ = 53280379768. Its totient is φ = 8218828800.

The previous prime is 21036563189. The next prime is 21036563239. The reversal of 21036563200 is 236563012.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 236980 + ... + 313420.

Almost surely, 2^21036563200 is an apocalyptic number.

21036563200 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 21036563200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26640189884).

21036563200 is an abundant number, since it is smaller than the sum of its proper divisors (32243816568).

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

21036563200 is an equidigital number, since it uses as much as digits as its factorization.

21036563200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76510 (or 76491 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 28.

The spelling of 21036563200 in words is "twenty-one billion, thirty-six million, five hundred sixty-three thousand, two hundred".