21822665475 has 96 divisors (see below), whose sum is σ = 39683960064. Its totient is φ = 10516492800.

The previous prime is 21822665437. The next prime is 21822665483. The reversal of 21822665475 is 57456622812.

It is a de Polignac number, because none of the positive numbers 2^k-21822665475 is a prime.

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 95 ways as a sum of consecutive naturals, for example, 11300260 + ... + 11302190.

It is an arithmetic number, because the mean of its divisors is an integer number (413374584).

Almost surely, 2^21822665475 is an apocalyptic number.

21822665475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

21822665475 is a deficient number, since it is larger than the sum of its proper divisors (17861294589).

21822665475 is a wasteful number, since it uses less digits than its factorization.

21822665475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2197 (or 2192 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 48.

The spelling of 21822665475 in words is "twenty-one billion, eight hundred twenty-two million, six hundred sixty-five thousand, four hundred seventy-five".