23004431021 has 8 divisors (see below), whose sum is σ = 27026184864. Its totient is φ = 19304417520.

The previous prime is 23004430997. The next prime is 23004431029. The reversal of 23004431021 is 12013440032.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23004431021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23004430984 and 23004431002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23004431029) 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 7 ways as a sum of consecutive naturals, for example, 80434931 + ... + 80435216.

It is an arithmetic number, because the mean of its divisors is an integer number (3378273108).

Almost surely, 2^23004431021 is an apocalyptic number.

It is an amenable number.

23004431021 is a deficient number, since it is larger than the sum of its proper divisors (4021753843).

23004431021 is a wasteful number, since it uses less digits than its factorization.

23004431021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160870171.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 23004431021 its reverse (12013440032), we get a palindrome (35017871053).

The spelling of 23004431021 in words is "twenty-three billion, four million, four hundred thirty-one thousand, twenty-one".