21982355530 has 8 divisors (see below), whose sum is σ = 39568239972. Its totient is φ = 8792942208.

The previous prime is 21982355503. The next prime is 21982355557. The reversal of 21982355530 is 3555328912.

It is an interprime number because it is at equal distance from previous prime (21982355503) and next prime (21982355557).

It can be written as a sum of positive squares in 2 ways, for example, as 21683446009 + 298909521 = 147253^2 + 17289^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099117767 + ... + 1099117786.

Almost surely, 2^21982355530 is an apocalyptic number.

21982355530 is a deficient number, since it is larger than the sum of its proper divisors (17585884442).

21982355530 is a wasteful number, since it uses less digits than its factorization.

21982355530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2198235560.

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 21982355530 in words is "twenty-one billion, nine hundred eighty-two million, three hundred fifty-five thousand, five hundred thirty".