20319199487 has 2 divisors, whose sum is σ = 20319199488. Its totient is φ = 20319199486.

The previous prime is 20319199477. The next prime is 20319199501. The reversal of 20319199487 is 78499191302.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20319199487 - 2⁶ = 20319199423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20319199447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10159599743 + 10159599744.

It is an arithmetic number, because the mean of its divisors is an integer number (10159599744).

Almost surely, 2^20319199487 is an apocalyptic number.

20319199487 is a deficient number, since it is larger than the sum of its proper divisors (1).

20319199487 is an equidigital number, since it uses as much as digits as its factorization.

20319199487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 979776, while the sum is 53.

The spelling of 20319199487 in words is "twenty billion, three hundred nineteen million, one hundred ninety-nine thousand, four hundred eighty-seven".