21832779443 has 2 divisors, whose sum is σ = 21832779444. Its totient is φ = 21832779442.

The previous prime is 21832779439. The next prime is 21832779467. The reversal of 21832779443 is 34497723812.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21832779443 - 2² = 21832779439 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21832779391 and 21832779400.

It is not a weakly prime, because it can be changed into another prime (21832779413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10916389721 + 10916389722.

It is an arithmetic number, because the mean of its divisors is an integer number (10916389722).

Almost surely, 2^21832779443 is an apocalyptic number.

21832779443 is a deficient number, since it is larger than the sum of its proper divisors (1).

21832779443 is an equidigital number, since it uses as much as digits as its factorization.

21832779443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2032128, while the sum is 50.

The spelling of 21832779443 in words is "twenty-one billion, eight hundred thirty-two million, seven hundred seventy-nine thousand, four hundred forty-three".