21332402167 has 2 divisors, whose sum is σ = 21332402168. Its totient is φ = 21332402166.

The previous prime is 21332402071. The next prime is 21332402197. The reversal of 21332402167 is 76120423312.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21332402167 - 2²³ = 21324013559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21332402197) 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, 10666201083 + 10666201084.

It is an arithmetic number, because the mean of its divisors is an integer number (10666201084).

Almost surely, 2^21332402167 is an apocalyptic number.

21332402167 is a deficient number, since it is larger than the sum of its proper divisors (1).

21332402167 is an equidigital number, since it uses as much as digits as its factorization.

21332402167 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 31.

Adding to 21332402167 its reverse (76120423312), we get a palindrome (97452825479).

The spelling of 21332402167 in words is "twenty-one billion, three hundred thirty-two million, four hundred two thousand, one hundred sixty-seven".