21633140033 has 8 divisors (see below), whose sum is σ = 22907081952. Its totient is φ = 20359354176.

The previous prime is 21633139973. The next prime is 21633140051. The reversal of 21633140033 is 33004133612.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21633140033 - 2⁸ = 21633139777 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21633139984 and 21633140011.

It is not an unprimeable number, because it can be changed into a prime (21633140233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 367466 + ... + 422252.

It is an arithmetic number, because the mean of its divisors is an integer number (2863385244).

Almost surely, 2^21633140033 is an apocalyptic number.

It is an amenable number.

21633140033 is a deficient number, since it is larger than the sum of its proper divisors (1273941919).

21633140033 is a wasteful number, since it uses less digits than its factorization.

21633140033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78031.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21633140033 its reverse (33004133612), we get a palindrome (54637273645).

The spelling of 21633140033 in words is "twenty-one billion, six hundred thirty-three million, one hundred forty thousand, thirty-three".