13821206633 has 4 divisors (see below), whose sum is σ = 14884376388. Its totient is φ = 12758036880.

The previous prime is 13821206629. The next prime is 13821206647. The reversal of 13821206633 is 33660212831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7973239849 + 5847966784 = 89293^2 + 76472^2 .

It is a cyclic number.

It is not a de Polignac number, because 13821206633 - 2² = 13821206629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13821206593 and 13821206602.

It is not an unprimeable number, because it can be changed into a prime (13821203633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 531584858 + ... + 531584883.

It is an arithmetic number, because the mean of its divisors is an integer number (3721094097).

Almost surely, 2^13821206633 is an apocalyptic number.

13821206633 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

13821206633 is a deficient number, since it is larger than the sum of its proper divisors (1063169755).

13821206633 is a wasteful number, since it uses less digits than its factorization.

13821206633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063169754.

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 13821206633 in words is "thirteen billion, eight hundred twenty-one million, two hundred six thousand, six hundred thirty-three".