21650563300 has 36 divisors (see below), whose sum is σ = 47778035760. Its totient is φ = 8513439520.

The previous prime is 21650563271. The next prime is 21650563331. The reversal of 21650563300 is 336505612.

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, 1828894 + ... + 1840693.

It is an arithmetic number, because the mean of its divisors is an integer number (1327167660).

Almost surely, 2^21650563300 is an apocalyptic number.

21650563300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21650563300 is an abundant number, since it is smaller than the sum of its proper divisors (26127472460).

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

21650563300 is a wasteful number, since it uses less digits than its factorization.

21650563300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3669660 (or 3669653 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The spelling of 21650563300 in words is "twenty-one billion, six hundred fifty million, five hundred sixty-three thousand, three hundred".