20867083231 has 2 divisors, whose sum is σ = 20867083232. Its totient is φ = 20867083230.

The previous prime is 20867083229. The next prime is 20867083261. The reversal of 20867083231 is 13238076802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20867083231 - 2¹ = 20867083229 is a prime.

It is a super-2 number, since 2×20867083231² (a number of 21 digits) contains 22 as substring.

Together with 20867083229, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20867083261) 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 as a sum of consecutive naturals, namely, 10433541615 + 10433541616.

It is an arithmetic number, because the mean of its divisors is an integer number (10433541616).

Almost surely, 2^20867083231 is an apocalyptic number.

20867083231 is a deficient number, since it is larger than the sum of its proper divisors (1).

20867083231 is an equidigital number, since it uses as much as digits as its factorization.

20867083231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 96768, while the sum is 40.

The spelling of 20867083231 in words is "twenty billion, eight hundred sixty-seven million, eighty-three thousand, two hundred thirty-one".