21633116624411 has 4 divisors (see below), whose sum is σ = 21633126888912. Its totient is φ = 21633106359912.

The previous prime is 21633116624407. The next prime is 21633116624429. The reversal of 21633116624411 is 11442661133612.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 21633116624411 - 2² = 21633116624407 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21633116624401) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 688175 + ... + 6613608.

It is an arithmetic number, because the mean of its divisors is an integer number (5408281722228).

Almost surely, 2^{21633116624411} is an apocalyptic number.

21633116624411 is a deficient number, since it is larger than the sum of its proper divisors (10264501).

21633116624411 is an equidigital number, since it uses as much as digits as its factorization.

21633116624411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10264500.

The product of its digits is 124416, while the sum is 41.

The spelling of 21633116624411 in words is "twenty-one trillion, six hundred thirty-three billion, one hundred sixteen million, six hundred twenty-four thousand, four hundred eleven".