20820700031 has 2 divisors, whose sum is σ = 20820700032. Its totient is φ = 20820700030.

The previous prime is 20820700007. The next prime is 20820700123. The reversal of 20820700031 is 13000702802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20820700031 - 2¹⁴ = 20820683647 is a prime.

It is a super-2 number, since 2×20820700031² (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 (20820700001) 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, 10410350015 + 10410350016.

It is an arithmetic number, because the mean of its divisors is an integer number (10410350016).

Almost surely, 2^20820700031 is an apocalyptic number.

20820700031 is a deficient number, since it is larger than the sum of its proper divisors (1).

20820700031 is an equidigital number, since it uses as much as digits as its factorization.

20820700031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

The spelling of 20820700031 in words is "twenty billion, eight hundred twenty million, seven hundred thousand, thirty-one".