31203320923 has 2 divisors, whose sum is σ = 31203320924. Its totient is φ = 31203320922.

The previous prime is 31203320917. The next prime is 31203320957. The reversal of 31203320923 is 32902330213.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31203320923 - 2¹³ = 31203312731 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31203320891 and 31203320900.

It is not a weakly prime, because it can be changed into another prime (31203320983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15601660461 + 15601660462.

It is an arithmetic number, because the mean of its divisors is an integer number (15601660462).

Almost surely, 2^31203320923 is an apocalyptic number.

31203320923 is a deficient number, since it is larger than the sum of its proper divisors (1).

31203320923 is an equidigital number, since it uses as much as digits as its factorization.

31203320923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 28.

The spelling of 31203320923 in words is "thirty-one billion, two hundred three million, three hundred twenty thousand, nine hundred twenty-three".