23004043021 has 4 divisors (see below), whose sum is σ = 23319166972. Its totient is φ = 22688919072.

The previous prime is 23004043001. The next prime is 23004043043. The reversal of 23004043021 is 12034040032.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9376048900 + 13627994121 = 96830^2 + 116739^2 .

It is a cyclic number.

It is not a de Polignac number, because 23004043021 - 2¹⁷ = 23003911949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 23004043021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23004043001) 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 3 ways as a sum of consecutive naturals, for example, 157561866 + ... + 157562011.

It is an arithmetic number, because the mean of its divisors is an integer number (5829791743).

Almost surely, 2^23004043021 is an apocalyptic number.

It is an amenable number.

23004043021 is a deficient number, since it is larger than the sum of its proper divisors (315123951).

23004043021 is an equidigital number, since it uses as much as digits as its factorization.

23004043021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315123950.

The product of its (nonzero) digits is 576, while the sum is 19.

Adding to 23004043021 its reverse (12034040032), we get a palindrome (35038083053).

The spelling of 23004043021 in words is "twenty-three billion, four million, forty-three thousand, twenty-one".