20320213031 has 8 divisors (see below), whose sum is σ = 20519164944. Its totient is φ = 20121428800.

The previous prime is 20320213027. The next prime is 20320213049. The reversal of 20320213031 is 13031202302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20320213031 - 2² = 20320213027 is a prime.

It is a super-2 number, since 2×20320213031² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320213061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208931 + ... + 290331.

It is an arithmetic number, because the mean of its divisors is an integer number (2564895618).

Almost surely, 2^20320213031 is an apocalyptic number.

20320213031 is a deficient number, since it is larger than the sum of its proper divisors (198951913).

20320213031 is a wasteful number, since it uses less digits than its factorization.

20320213031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83841.

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

Adding to 20320213031 its reverse (13031202302), we get a palindrome (33351415333).

The spelling of 20320213031 in words is "twenty billion, three hundred twenty million, two hundred thirteen thousand, thirty-one".