20319199501 has 2 divisors, whose sum is σ = 20319199502. Its totient is φ = 20319199500.

The previous prime is 20319199487. The next prime is 20319199513. The reversal of 20319199501 is 10599191302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13823645476 + 6495554025 = 117574^2 + 80595^2 .

It is a cyclic number.

It is not a de Polignac number, because 20319199501 - 2¹³ = 20319191309 is a prime.

It is a super-2 number, since 2×20319199501² (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 (20319199591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10159599750 + 10159599751.

It is an arithmetic number, because the mean of its divisors is an integer number (10159599751).

Almost surely, 2^20319199501 is an apocalyptic number.

It is an amenable number.

20319199501 is a deficient number, since it is larger than the sum of its proper divisors (1).

20319199501 is an equidigital number, since it uses as much as digits as its factorization.

20319199501 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21870, while the sum is 40.

The spelling of 20319199501 in words is "twenty billion, three hundred nineteen million, one hundred ninety-nine thousand, five hundred one".