21854645822 has 16 divisors (see below), whose sum is σ = 33602706144. Its totient is φ = 10654080000.

The previous prime is 21854645807. The next prime is 21854645867. The reversal of 21854645822 is 22854645812.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48047 + ... + 214517.

It is an arithmetic number, because the mean of its divisors is an integer number (2100169134).

Almost surely, 2^21854645822 is an apocalyptic number.

21854645822 is a deficient number, since it is larger than the sum of its proper divisors (11748060322).

21854645822 is a wasteful number, since it uses less digits than its factorization.

21854645822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168115.

The product of its digits is 1228800, while the sum is 47.

The spelling of 21854645822 in words is "twenty-one billion, eight hundred fifty-four million, six hundred forty-five thousand, eight hundred twenty-two".