231320201994 has 192 divisors, whose sum is σ = 587097538560. Its totient is φ = 64465632000.

The previous prime is 231320201993. The next prime is 231320202011. The reversal of 231320201994 is 499102023132.

231320201994 is a `hidden beast` number, since 231 + 320 + 2 + 0 + 19 + 94 = 666.

231320201994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (231320201993) 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 95 ways as a sum of consecutive naturals, for example, 565574862 + ... + 565575270.

It is an arithmetic number, because the mean of its divisors is an integer number (3057799680).

Almost surely, 2^231320201994 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231320201994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (293548769280).

231320201994 is an abundant number, since it is smaller than the sum of its proper divisors (355777336566).

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

231320201994 is a wasteful number, since it uses less digits than its factorization.

231320201994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017 (or 1014 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The spelling of 231320201994 in words is "two hundred thirty-one billion, three hundred twenty million, two hundred one thousand, nine hundred ninety-four".