31095020923 has 2 divisors, whose sum is σ = 31095020924. Its totient is φ = 31095020922.

The previous prime is 31095020899. The next prime is 31095020933. The reversal of 31095020923 is 32902059013.

It is a strong prime.

It is an emirp because it is prime and its reverse (32902059013) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31095020923 is a prime.

It is not a weakly prime, because it can be changed into another prime (31095020933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15547510461 + 15547510462.

It is an arithmetic number, because the mean of its divisors is an integer number (15547510462).

Almost surely, 2^31095020923 is an apocalyptic number.

31095020923 is a deficient number, since it is larger than the sum of its proper divisors (1).

31095020923 is an equidigital number, since it uses as much as digits as its factorization.

31095020923 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 34.

Adding to 31095020923 its reverse (32902059013), we get a palindrome (63997079936).

The spelling of 31095020923 in words is "thirty-one billion, ninety-five million, twenty thousand, nine hundred twenty-three".