19197019605 has 8 divisors (see below), whose sum is σ = 30715231392. Its totient is φ = 10238410448.

The previous prime is 19197019591. The next prime is 19197019613. The reversal of 19197019605 is 50691079191.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19197019605 - 2⁵ = 19197019573 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 639900639 + ... + 639900668.

It is an arithmetic number, because the mean of its divisors is an integer number (3839403924).

Almost surely, 2^19197019605 is an apocalyptic number.

19197019605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

19197019605 is a deficient number, since it is larger than the sum of its proper divisors (11518211787).

19197019605 is a wasteful number, since it uses less digits than its factorization.

19197019605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279801315.

The product of its (nonzero) digits is 153090, while the sum is 48.

It can be divided in two parts, 191970 and 19605, that added together give a triangular number (211575 = T₆₅₀).

The spelling of 19197019605 in words is "nineteen billion, one hundred ninety-seven million, nineteen thousand, six hundred five".