20000023231 has 4 divisors (see below), whose sum is σ = 20127412072. Its totient is φ = 19872634392.

The previous prime is 20000023193. The next prime is 20000023243. The reversal of 20000023231 is 13232000002.

It is a happy number.

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 20000023231 - 2⁷ = 20000023103 is a prime.

It is a super-2 number, since 2×20000023231² (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 (20000021231) 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, 63694185 + ... + 63694498.

It is an arithmetic number, because the mean of its divisors is an integer number (5031853018).

Almost surely, 2^20000023231 is an apocalyptic number.

20000023231 is a deficient number, since it is larger than the sum of its proper divisors (127388841).

20000023231 is a wasteful number, since it uses less digits than its factorization.

20000023231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127388840.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 20000023231 its reverse (13232000002), we get a palindrome (33232023233).

The spelling of 20000023231 in words is "twenty billion, twenty-three thousand, two hundred thirty-one".