19520077197 has 8 divisors (see below), whose sum is σ = 26094726144. Its totient is φ = 12979406528.

The previous prime is 19520077189. The next prime is 19520077201. The reversal of 19520077197 is 79177002591.

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 19520077197 - 2³ = 19520077189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19520097197) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8493228 + ... + 8495525.

It is an arithmetic number, because the mean of its divisors is an integer number (3261840768).

Almost surely, 2^19520077197 is an apocalyptic number.

It is an amenable number.

19520077197 is a deficient number, since it is larger than the sum of its proper divisors (6574648947).

19520077197 is a wasteful number, since it uses less digits than its factorization.

19520077197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16989139.

The product of its (nonzero) digits is 277830, while the sum is 48.

The spelling of 19520077197 in words is "nineteen billion, five hundred twenty million, seventy-seven thousand, one hundred ninety-seven".