21323278230 has 16 divisors (see below), whose sum is σ = 51175867824. Its totient is φ = 5686207520.

The previous prime is 21323278217. The next prime is 21323278231. The reversal of 21323278230 is 3287232312.

It is a junction number, because it is equal to n+sod(n) for n = 21323278191 and 21323278200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323278231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 355387941 + ... + 355388000.

It is an arithmetic number, because the mean of its divisors is an integer number (3198491739).

Almost surely, 2^21323278230 is an apocalyptic number.

21323278230 is an abundant number, since it is smaller than the sum of its proper divisors (29852589594).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21323278230 is a wasteful number, since it uses less digits than its factorization.

21323278230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710775951.

The product of its (nonzero) digits is 24192, while the sum is 33.

The spelling of 21323278230 in words is "twenty-one billion, three hundred twenty-three million, two hundred seventy-eight thousand, two hundred thirty".