20004023231 has 4 divisors (see below), whose sum is σ = 20006047464. Its totient is φ = 20001999000.

The previous prime is 20004023183. The next prime is 20004023239. The reversal of 20004023231 is 13232040002.

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

It is a cyclic number.

It is not a de Polignac number, because 20004023231 - 2³⁰ = 18930281407 is a prime.

It is a super-2 number, since 2×20004023231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004023239) 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, 997220 + ... + 1017081.

It is an arithmetic number, because the mean of its divisors is an integer number (5001511866).

Almost surely, 2^20004023231 is an apocalyptic number.

20004023231 is a deficient number, since it is larger than the sum of its proper divisors (2024233).

20004023231 is an equidigital number, since it uses as much as digits as its factorization.

20004023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024232.

The product of its (nonzero) digits is 288, while the sum is 17.

Adding to 20004023231 its reverse (13232040002), we get a palindrome (33236063233).

The spelling of 20004023231 in words is "twenty billion, four million, twenty-three thousand, two hundred thirty-one".