20315224031 has 4 divisors (see below), whose sum is σ = 20315618064. Its totient is φ = 20314830000.

The previous prime is 20315224001. The next prime is 20315224037. The reversal of 20315224031 is 13042251302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20315224031 - 2¹⁰ = 20315223007 is a prime.

It is a super-2 number, since 2×20315224031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20315223988 and 20315224006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315224037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 105515 + ... + 227516.

It is an arithmetic number, because the mean of its divisors is an integer number (5078904516).

Almost surely, 2^20315224031 is an apocalyptic number.

20315224031 is a deficient number, since it is larger than the sum of its proper divisors (394033).

20315224031 is an equidigital number, since it uses as much as digits as its factorization.

20315224031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394032.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 20315224031 its reverse (13042251302), we get a palindrome (33357475333).

The spelling of 20315224031 in words is "twenty billion, three hundred fifteen million, two hundred twenty-four thousand, thirty-one".