21842432826 has 8 divisors (see below), whose sum is σ = 43684865664. Its totient is φ = 7280810940.

The previous prime is 21842432819. The next prime is 21842432861. The reversal of 21842432826 is 62823424812.

It is a sphenic number, since it is the product of 3 distinct primes.

21842432826 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1820202730 + ... + 1820202741.

It is an arithmetic number, because the mean of its divisors is an integer number (5460608208).

Almost surely, 2^21842432826 is an apocalyptic number.

21842432826 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21842432826 is a wasteful number, since it uses less digits than its factorization.

21842432826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640405476.

The product of its digits is 294912, while the sum is 42.

The spelling of 21842432826 in words is "twenty-one billion, eight hundred forty-two million, four hundred thirty-two thousand, eight hundred twenty-six".