19377666693 has 80 divisors (see below), whose sum is σ = 36598763520. Its totient is φ = 9924314400.

The previous prime is 19377666691. The next prime is 19377666719. The reversal of 19377666693 is 39666677391.

It is not a de Polignac number, because 19377666693 - 2¹ = 19377666691 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 19377666693.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19377666691) 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 in 79 ways as a sum of consecutive naturals, for example, 420948 + ... + 464706.

It is an arithmetic number, because the mean of its divisors is an integer number (457484544).

Almost surely, 2^19377666693 is an apocalyptic number.

It is an amenable number.

19377666693 is a deficient number, since it is larger than the sum of its proper divisors (17221096827).

19377666693 is a wasteful number, since it uses less digits than its factorization.

19377666693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43860 (or 43851 counting only the distinct ones).

The product of its digits is 46294416, while the sum is 63.

The spelling of 19377666693 in words is "nineteen billion, three hundred seventy-seven million, six hundred sixty-six thousand, six hundred ninety-three".