23230020421 has 4 divisors (see below), whose sum is σ = 23232077932. Its totient is φ = 23227962912.

The previous prime is 23230020409. The next prime is 23230020431. The reversal of 23230020421 is 12402003232.

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 2765287396 + 20464733025 = 52586^2 + 143055^2 .

It is a cyclic number.

It is not a de Polignac number, because 23230020421 - 2¹⁷ = 23229889349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23230020431) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1011726 + ... + 1034431.

It is an arithmetic number, because the mean of its divisors is an integer number (5808019483).

Almost surely, 2^23230020421 is an apocalyptic number.

It is an amenable number.

23230020421 is a deficient number, since it is larger than the sum of its proper divisors (2057511).

23230020421 is a wasteful number, since it uses less digits than its factorization.

23230020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2057510.

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

Adding to 23230020421 its reverse (12402003232), we get a palindrome (35632023653).

The spelling of 23230020421 in words is "twenty-three billion, two hundred thirty million, twenty thousand, four hundred twenty-one".