21890009576 has 32 divisors (see below), whose sum is σ = 41825894400. Its totient is φ = 10737378240.

The previous prime is 21890009567. The next prime is 21890009639. The reversal of 21890009576 is 67590009812.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 21890009576.

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 7 ways as a sum of consecutive naturals, for example, 128345 + ... + 245463.

It is an arithmetic number, because the mean of its divisors is an integer number (1307059200).

Almost surely, 2^21890009576 is an apocalyptic number.

It is an amenable number.

21890009576 is a deficient number, since it is larger than the sum of its proper divisors (19935884824).

21890009576 is a wasteful number, since it uses less digits than its factorization.

21890009576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117569 (or 117565 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 47.

The spelling of 21890009576 in words is "twenty-one billion, eight hundred ninety million, nine thousand, five hundred seventy-six".