20387873719 has 2 divisors, whose sum is σ = 20387873720. Its totient is φ = 20387873718.

The previous prime is 20387873689. The next prime is 20387873731. The reversal of 20387873719 is 91737878302.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20387873719 - 2⁵ = 20387873687 is a prime.

It is a super-2 number, since 2×20387873719² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20387873719.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20387873749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10193936859 + 10193936860.

It is an arithmetic number, because the mean of its divisors is an integer number (10193936860).

Almost surely, 2^20387873719 is an apocalyptic number.

20387873719 is a deficient number, since it is larger than the sum of its proper divisors (1).

20387873719 is an equidigital number, since it uses as much as digits as its factorization.

20387873719 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3556224, while the sum is 55.

The spelling of 20387873719 in words is "twenty billion, three hundred eighty-seven million, eight hundred seventy-three thousand, seven hundred nineteen".