21167340023 has 2 divisors, whose sum is σ = 21167340024. Its totient is φ = 21167340022.

The previous prime is 21167340001. The next prime is 21167340037. The reversal of 21167340023 is 32004376112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21167340023 - 2¹⁶ = 21167274487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21167340053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10583670011 + 10583670012.

It is an arithmetic number, because the mean of its divisors is an integer number (10583670012).

Almost surely, 2^21167340023 is an apocalyptic number.

21167340023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21167340023 is an equidigital number, since it uses as much as digits as its factorization.

21167340023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 29.

The spelling of 21167340023 in words is "twenty-one billion, one hundred sixty-seven million, three hundred forty thousand, twenty-three".