21824427550 has 12 divisors (see below), whose sum is σ = 40593435336. Its totient is φ = 8729771000.

The previous prime is 21824427529. The next prime is 21824427571. The reversal of 21824427550 is 5572442812.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21824427529) and next prime (21824427571).

It is a congruent 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 5 ways as a sum of consecutive naturals, for example, 218244226 + ... + 218244325.

It is an arithmetic number, because the mean of its divisors is an integer number (3382786278).

Almost surely, 2^21824427550 is an apocalyptic number.

21824427550 is a deficient number, since it is larger than the sum of its proper divisors (18769007786).

21824427550 is a wasteful number, since it uses less digits than its factorization.

21824427550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436488563 (or 436488558 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 40.

The spelling of 21824427550 in words is "twenty-one billion, eight hundred twenty-four million, four hundred twenty-seven thousand, five hundred fifty".