20231231238 has 12 divisors (see below), whose sum is σ = 43834334388. Its totient is φ = 6743743740.

The previous prime is 20231231233. The next prime is 20231231239. The reversal of 20231231238 is 83213213202.

It is a happy number.

20231231238 is a `hidden beast` number, since 2 + 0 + 2 + 312 + 312 + 38 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20231231233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 561978628 + ... + 561978663.

It is an arithmetic number, because the mean of its divisors is an integer number (3652861199).

Almost surely, 2^20231231238 is an apocalyptic number.

20231231238 is an abundant number, since it is smaller than the sum of its proper divisors (23603103150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20231231238 is a wasteful number, since it uses less digits than its factorization.

20231231238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1123957299 (or 1123957296 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The spelling of 20231231238 in words is "twenty billion, two hundred thirty-one million, two hundred thirty-one thousand, two hundred thirty-eight".