20000099501 has 2 divisors, whose sum is σ = 20000099502. Its totient is φ = 20000099500.

The previous prime is 20000099479. The next prime is 20000099513. The reversal of 20000099501 is 10599000002.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19965407401 + 34692100 = 141299^2 + 5890^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20000099501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20000099401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10000049750 + 10000049751.

It is an arithmetic number, because the mean of its divisors is an integer number (10000049751).

Almost surely, 2^20000099501 is an apocalyptic number.

It is an amenable number.

20000099501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20000099501 is an equidigital number, since it uses as much as digits as its factorization.

20000099501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 810, while the sum is 26.

Adding to 20000099501 its reverse (10599000002), we get a palindrome (30599099503).

The spelling of 20000099501 in words is "twenty billion, ninety-nine thousand, five hundred one".