23340434021 has 2 divisors, whose sum is σ = 23340434022. Its totient is φ = 23340434020.

The previous prime is 23340434011. The next prime is 23340434041. The reversal of 23340434021 is 12043404332.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18200977921 + 5139456100 = 134911^2 + 71690^2 .

It is a cyclic number.

It is not a de Polignac number, because 23340434021 - 2³⁰ = 22266692197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23340434011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11670217010 + 11670217011.

It is an arithmetic number, because the mean of its divisors is an integer number (11670217011).

Almost surely, 2^23340434021 is an apocalyptic number.

It is an amenable number.

23340434021 is a deficient number, since it is larger than the sum of its proper divisors (1).

23340434021 is an equidigital number, since it uses as much as digits as its factorization.

23340434021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 23340434021 its reverse (12043404332), we get a palindrome (35383838353).

The spelling of 23340434021 in words is "twenty-three billion, three hundred forty million, four hundred thirty-four thousand, twenty-one".