21846822429 has 4 divisors (see below), whose sum is σ = 29129096576. Its totient is φ = 14564548284.

The previous prime is 21846822401. The next prime is 21846822467. The reversal of 21846822429 is 92422864812.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 21846822429 - 2⁵ = 21846822397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21846822469) 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, 3641137069 + ... + 3641137074.

It is an arithmetic number, because the mean of its divisors is an integer number (7282274144).

Almost surely, 2^21846822429 is an apocalyptic number.

It is an amenable number.

21846822429 is a deficient number, since it is larger than the sum of its proper divisors (7282274147).

21846822429 is an equidigital number, since it uses as much as digits as its factorization.

21846822429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7282274146.

The product of its digits is 884736, while the sum is 48.

The spelling of 21846822429 in words is "twenty-one billion, eight hundred forty-six million, eight hundred twenty-two thousand, four hundred twenty-nine".