20130019997 has 2 divisors, whose sum is σ = 20130019998. Its totient is φ = 20130019996.

The previous prime is 20130019967. The next prime is 20130020021. The reversal of 20130019997 is 79991003102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13804840036 + 6325179961 = 117494^2 + 79531^2 .

It is a cyclic number.

It is not a de Polignac number, because 20130019997 - 2¹⁰ = 20130018973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20130019937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065009998 + 10065009999.

It is an arithmetic number, because the mean of its divisors is an integer number (10065009999).

Almost surely, 2^20130019997 is an apocalyptic number.

It is an amenable number.

20130019997 is a deficient number, since it is larger than the sum of its proper divisors (1).

20130019997 is an equidigital number, since it uses as much as digits as its factorization.

20130019997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30618, while the sum is 41.

The spelling of 20130019997 in words is "twenty billion, one hundred thirty million, nineteen thousand, nine hundred ninety-seven".