21323112633 has 24 divisors (see below), whose sum is σ = 32102320640. Its totient is φ = 13623266880.

The previous prime is 21323112611. The next prime is 21323112649. The reversal of 21323112633 is 33621132312.

21323112633 is a `hidden beast` number, since 2 + 1 + 3 + 23 + 1 + 1 + 2 + 633 = 666.

It is not a de Polignac number, because 21323112633 - 2¹⁸ = 21322850489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21323112597 and 21323112606.

It is not an unprimeable number, because it can be changed into a prime (21323113633) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 342268 + ... + 399741.

Almost surely, 2^21323112633 is an apocalyptic number.

It is an amenable number.

21323112633 is a deficient number, since it is larger than the sum of its proper divisors (10779208007).

21323112633 is a wasteful number, since it uses less digits than its factorization.

21323112633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 742149 (or 742146 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 21323112633 its reverse (33621132312), we get a palindrome (54944244945).

It can be divided in two parts, 21323 and 112633, that added together give a square (133956 = 366²).

The spelling of 21323112633 in words is "twenty-one billion, three hundred twenty-three million, one hundred twelve thousand, six hundred thirty-three".