20079699901 has 2 divisors, whose sum is σ = 20079699902. Its totient is φ = 20079699900.

The previous prime is 20079699883. The next prime is 20079699917. The reversal of 20079699901 is 10999697002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19653236100 + 426463801 = 140190^2 + 20651^2 .

It is a cyclic number.

It is not a de Polignac number, because 20079699901 - 2⁵ = 20079699869 is a prime.

It is a super-2 number, since 2×20079699901² (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 (20079699701) 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, 10039849950 + 10039849951.

It is an arithmetic number, because the mean of its divisors is an integer number (10039849951).

Almost surely, 2^20079699901 is an apocalyptic number.

It is an amenable number.

20079699901 is a deficient number, since it is larger than the sum of its proper divisors (1).

20079699901 is an equidigital number, since it uses as much as digits as its factorization.

20079699901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 551124, while the sum is 52.

The spelling of 20079699901 in words is "twenty billion, seventy-nine million, six hundred ninety-nine thousand, nine hundred one".