21223839286 has 32 divisors (see below), whose sum is σ = 35422390080. Its totient is φ = 9473728896.

The previous prime is 21223839271. The next prime is 21223839311. The reversal of 21223839286 is 68293832212.

It is a happy number.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94600 + ... + 226708.

It is an arithmetic number, because the mean of its divisors is an integer number (1106949690).

Almost surely, 2^21223839286 is an apocalyptic number.

21223839286 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

21223839286 is a deficient number, since it is larger than the sum of its proper divisors (14198550794).

21223839286 is a wasteful number, since it uses less digits than its factorization.

21223839286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132328.

The product of its digits is 497664, while the sum is 46.

The spelling of 21223839286 in words is "twenty-one billion, two hundred twenty-three million, eight hundred thirty-nine thousand, two hundred eighty-six".