21633350470021 has 16 divisors (see below), whose sum is σ = 23158316966400. Its totient is φ = 20147033002608.

The previous prime is 21633350470019. The next prime is 21633350470051. The reversal of 21633350470021 is 12007405333612.

It is not a de Polignac number, because 21633350470021 - 2¹ = 21633350470019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21633350470051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82041030 + ... + 82304296.

It is an arithmetic number, because the mean of its divisors is an integer number (1447394810400).

Almost surely, 2^{21633350470021} is an apocalyptic number.

It is an amenable number.

21633350470021 is a deficient number, since it is larger than the sum of its proper divisors (1524966496379).

21633350470021 is a wasteful number, since it uses less digits than its factorization.

21633350470021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336648.

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 21633350470021 in words is "twenty-one trillion, six hundred thirty-three billion, three hundred fifty million, four hundred seventy thousand, twenty-one".