20310005391 has 16 divisors (see below), whose sum is σ = 29177295840. Its totient is φ = 12492374400.

The previous prime is 20310005371. The next prime is 20310005413. The reversal of 20310005391 is 19350001302.

It is a happy number.

It is not a de Polignac number, because 20310005391 - 2⁹ = 20310004879 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20310005371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45160 + ... + 206541.

It is an arithmetic number, because the mean of its divisors is an integer number (1823580990).

Almost surely, 2^20310005391 is an apocalyptic number.

20310005391 is a deficient number, since it is larger than the sum of its proper divisors (8867290449).

20310005391 is a wasteful number, since it uses less digits than its factorization.

20310005391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253786.

The product of its (nonzero) digits is 810, while the sum is 24.

Adding to 20310005391 its reverse (19350001302), we get a palindrome (39660006693).

The spelling of 20310005391 in words is "twenty billion, three hundred ten million, five thousand, three hundred ninety-one".