21874889306 has 8 divisors (see below), whose sum is σ = 32815935444. Its totient is φ = 10936244160.

The previous prime is 21874889299. The next prime is 21874889317. The reversal of 21874889306 is 60398847812.

It can be written as a sum of positive squares in 2 ways, for example, as 18756672025 + 3118217281 = 136955^2 + 55841^2 .

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 577295 + ... + 614018.

Almost surely, 2^21874889306 is an apocalyptic number.

21874889306 is a deficient number, since it is larger than the sum of its proper divisors (10941046138).

21874889306 is a wasteful number, since it uses less digits than its factorization.

21874889306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200496.

The product of its (nonzero) digits is 4644864, while the sum is 56.

The spelling of 21874889306 in words is "twenty-one billion, eight hundred seventy-four million, eight hundred eighty-nine thousand, three hundred six".