21846295643 has 4 divisors (see below), whose sum is σ = 22796134608. Its totient is φ = 20896456680.

The previous prime is 21846295637. The next prime is 21846295661. The reversal of 21846295643 is 34659264812.

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 21846295643 - 2¹⁰ = 21846294619 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21846295591 and 21846295600.

It is not an unprimeable number, because it can be changed into a prime (21846295663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 474919448 + ... + 474919493.

It is an arithmetic number, because the mean of its divisors is an integer number (5699033652).

Almost surely, 2^21846295643 is an apocalyptic number.

21846295643 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21846295643 is a deficient number, since it is larger than the sum of its proper divisors (949838965).

21846295643 is an equidigital number, since it uses as much as digits as its factorization.

21846295643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949838964.

The product of its digits is 2488320, while the sum is 50.

The spelling of 21846295643 in words is "twenty-one billion, eight hundred forty-six million, two hundred ninety-five thousand, six hundred forty-three".