21839931284 has 12 divisors (see below), whose sum is σ = 38221372308. Its totient is φ = 10919539200.

The previous prime is 21839931271. The next prime is 21839931319. The reversal of 21839931284 is 48213993812.

It can be written as a sum of positive squares in 2 ways, for example, as 9876384400 + 11963546884 = 99380^2 + 109378^2 .

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 27314 + ... + 210774.

It is an arithmetic number, because the mean of its divisors is an integer number (3185114359).

Almost surely, 2^21839931284 is an apocalyptic number.

It is an amenable number.

21839931284 is a deficient number, since it is larger than the sum of its proper divisors (16381441024).

21839931284 is a wasteful number, since it uses less digits than its factorization.

21839931284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213226 (or 213224 counting only the distinct ones).

The product of its digits is 746496, while the sum is 50.

The spelling of 21839931284 in words is "twenty-one billion, eight hundred thirty-nine million, nine hundred thirty-one thousand, two hundred eighty-four".