21633221247488 has 40 divisors (see below), whose sum is σ = 43371713243628. Its totient is φ = 10779693789184.

The previous prime is 21633221247431. The next prime is 21633221247541. The reversal of 21633221247488 is 88474212233612.

It can be written as a sum of positive squares in 2 ways, for example, as 21578180333824 + 55040913664 = 4645232^2 + 234608^2 .

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 3 ways as a sum of consecutive naturals, for example, 71953031 + ... + 72253062.

Almost surely, 2^{21633221247488} is an apocalyptic number.

It is an amenable number.

21633221247488 is an abundant number, since it is smaller than the sum of its proper divisors (21738491996140).

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

21633221247488 is an equidigital number, since it uses as much as digits as its factorization.

21633221247488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144206404 (or 144206388 counting only the distinct ones).

The product of its digits is 6193152, while the sum is 53.

The spelling of 21633221247488 in words is "twenty-one trillion, six hundred thirty-three billion, two hundred twenty-one million, two hundred forty-seven thousand, four hundred eighty-eight".