19140786677 has 2 divisors, whose sum is σ = 19140786678. Its totient is φ = 19140786676.

The previous prime is 19140786673. The next prime is 19140786697. The reversal of 19140786677 is 77668704191.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10266958276 + 8873828401 = 101326^2 + 94201^2 .

It is a cyclic number.

It is not a de Polignac number, because 19140786677 - 2² = 19140786673 is a prime.

It is a super-2 number, since 2×19140786677² (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 (19140786673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9570393338 + 9570393339.

It is an arithmetic number, because the mean of its divisors is an integer number (9570393339).

Almost surely, 2^19140786677 is an apocalyptic number.

It is an amenable number.

19140786677 is a deficient number, since it is larger than the sum of its proper divisors (1).

19140786677 is an equidigital number, since it uses as much as digits as its factorization.

19140786677 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 56.

The spelling of 19140786677 in words is "nineteen billion, one hundred forty million, seven hundred eighty-six thousand, six hundred seventy-seven".