21833716331 has 4 divisors (see below), whose sum is σ = 24952818672. Its totient is φ = 18714613992.

The previous prime is 21833716319. The next prime is 21833716367. The reversal of 21833716331 is 13361733812.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21833716331 - 2¹⁸ = 21833454187 is a prime.

It is a super-2 number, since 2×21833716331² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21833719331) 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, 1559551160 + ... + 1559551173.

It is an arithmetic number, because the mean of its divisors is an integer number (6238204668).

Almost surely, 2^21833716331 is an apocalyptic number.

21833716331 is a deficient number, since it is larger than the sum of its proper divisors (3119102341).

21833716331 is an equidigital number, since it uses as much as digits as its factorization.

21833716331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119102340.

The product of its digits is 54432, while the sum is 38.

The spelling of 21833716331 in words is "twenty-one billion, eight hundred thirty-three million, seven hundred sixteen thousand, three hundred thirty-one".