20332320031 has 4 divisors (see below), whose sum is σ = 20881842232. Its totient is φ = 19782797832.

The previous prime is 20332320017. The next prime is 20332320049. The reversal of 20332320031 is 13002323302.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13002323302 = 2 ⋅6501161651.

It is a cyclic number.

It is not a de Polignac number, because 20332320031 - 2⁹ = 20332319519 is a prime.

It is a super-2 number, since 2×20332320031² (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 = 20332319990 and 20332320008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20332320061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 274761045 + ... + 274761118.

It is an arithmetic number, because the mean of its divisors is an integer number (5220460558).

Almost surely, 2^20332320031 is an apocalyptic number.

20332320031 is a deficient number, since it is larger than the sum of its proper divisors (549522201).

20332320031 is an equidigital number, since it uses as much as digits as its factorization.

20332320031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549522200.

The product of its (nonzero) digits is 648, while the sum is 19.

Adding to 20332320031 its reverse (13002323302), we get a palindrome (33334643333).

The spelling of 20332320031 in words is "twenty billion, three hundred thirty-two million, three hundred twenty thousand, thirty-one".