21633221247020 has 24 divisors (see below), whose sum is σ = 45437322642768. Its totient is φ = 8651848875200.

The previous prime is 21633221247017. The next prime is 21633221247073. The reversal of 21633221247020 is 2074212233612.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 89853251 + ... + 90093690.

It is an arithmetic number, because the mean of its divisors is an integer number (1893221776782).

Almost surely, 2^{21633221247020} is an apocalyptic number.

21633221247020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21633221247020 is an abundant number, since it is smaller than the sum of its proper divisors (23804101395748).

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

21633221247020 is a wasteful number, since it uses less digits than its factorization.

21633221247020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179952961 (or 179952959 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 35.

The spelling of 21633221247020 in words is "twenty-one trillion, six hundred thirty-three billion, two hundred twenty-one million, two hundred forty-seven thousand, twenty".