20323210031 has 16 divisors (see below), whose sum is σ = 21954447360. Its totient is φ = 18743387520.

The previous prime is 20323210007. The next prime is 20323210073. The reversal of 20323210031 is 13001232302.

It is a cyclic number.

It is not a de Polignac number, because 20323210031 - 2²² = 20319015727 is a prime.

It is a super-2 number, since 2×20323210031² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a junction number, because it is equal to n+sod(n) for n = 20323209991 and 20323210009.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20323210081) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 170840 + ... + 264258.

It is an arithmetic number, because the mean of its divisors is an integer number (1372152960).

Almost surely, 2^20323210031 is an apocalyptic number.

20323210031 is a deficient number, since it is larger than the sum of its proper divisors (1631237329).

20323210031 is a wasteful number, since it uses less digits than its factorization.

20323210031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93694.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 20323210031 its reverse (13001232302), we get a palindrome (33324442333).

The spelling of 20323210031 in words is "twenty billion, three hundred twenty-three million, two hundred ten thousand, thirty-one".