20320503031 has 2 divisors, whose sum is σ = 20320503032. Its totient is φ = 20320503030.

The previous prime is 20320503023. The next prime is 20320503079. The reversal of 20320503031 is 13030502302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20320503031 - 2³ = 20320503023 is a prime.

It is a super-2 number, since 2×20320503031² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20320503331) 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 as a sum of consecutive naturals, namely, 10160251515 + 10160251516.

It is an arithmetic number, because the mean of its divisors is an integer number (10160251516).

Almost surely, 2^20320503031 is an apocalyptic number.

20320503031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20320503031 is an equidigital number, since it uses as much as digits as its factorization.

20320503031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 19.

The spelling of 20320503031 in words is "twenty billion, three hundred twenty million, five hundred three thousand, thirty-one".