21068850231 has 48 divisors (see below), whose sum is σ = 35773369632. Its totient is φ = 11780121600.

The previous prime is 21068850221. The next prime is 21068850239. The reversal of 21068850231 is 13205886012.

It is a happy number.

It is not a de Polignac number, because 21068850231 - 2⁶ = 21068850167 is a prime.

It is a super-2 number, since 2×21068850231² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21068850239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3076371 + ... + 3083211.

It is an arithmetic number, because the mean of its divisors is an integer number (745278534).

Almost surely, 2^21068850231 is an apocalyptic number.

21068850231 is a deficient number, since it is larger than the sum of its proper divisors (14704519401).

21068850231 is a wasteful number, since it uses less digits than its factorization.

21068850231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9264 (or 9261 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The spelling of 21068850231 in words is "twenty-one billion, sixty-eight million, eight hundred fifty thousand, two hundred thirty-one".