19606677385 has 4 divisors (see below), whose sum is σ = 23528012868. Its totient is φ = 15685341904.

The previous prime is 19606677361. The next prime is 19606677421. The reversal of 19606677385 is 58377660691.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10006401024 + 9600276361 = 100032^2 + 97981^2 .

It is a cyclic number.

It is not a de Polignac number, because 19606677385 - 2²⁹ = 19069806473 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1960667734 + ... + 1960667743.

It is an arithmetic number, because the mean of its divisors is an integer number (5882003217).

Almost surely, 2^19606677385 is an apocalyptic number.

It is an amenable number.

19606677385 is a deficient number, since it is larger than the sum of its proper divisors (3921335483).

19606677385 is an equidigital number, since it uses as much as digits as its factorization.

19606677385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921335482.

The product of its (nonzero) digits is 11430720, while the sum is 58.

The spelling of 19606677385 in words is "nineteen billion, six hundred six million, six hundred seventy-seven thousand, three hundred eighty-five".