19461936685 has 16 divisors (see below), whose sum is σ = 25580804400. Its totient is φ = 14148391936.

The previous prime is 19461936643. The next prime is 19461936701. The reversal of 19461936685 is 58663916491.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 399440196 + 19062496489 = 19986^2 + 138067^2 .

It is not a de Polignac number, because 19461936685 - 2⁹ = 19461936173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3945190 + ... + 3950119.

It is an arithmetic number, because the mean of its divisors is an integer number (1598800275).

Almost surely, 2^19461936685 is an apocalyptic number.

It is an amenable number.

19461936685 is a deficient number, since it is larger than the sum of its proper divisors (6118867715).

19461936685 is a wasteful number, since it uses less digits than its factorization.

19461936685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7895360.

The product of its digits is 8398080, while the sum is 58.

The spelling of 19461936685 in words is "nineteen billion, four hundred sixty-one million, nine hundred thirty-six thousand, six hundred eighty-five".