19704077497 has 8 divisors (see below), whose sum is σ = 21225322944. Its totient is φ = 18183624528.

The previous prime is 19704077479. The next prime is 19704077507. The reversal of 19704077497 is 79477040791.

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 a de Polignac number, because none of the positive numbers 2^k-19704077497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19704077417) 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, 145963 + ... + 246400.

It is an arithmetic number, because the mean of its divisors is an integer number (2653165368).

Almost surely, 2^19704077497 is an apocalyptic number.

It is an amenable number.

19704077497 is a deficient number, since it is larger than the sum of its proper divisors (1521245447).

19704077497 is a wasteful number, since it uses less digits than its factorization.

19704077497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396239.

The product of its (nonzero) digits is 3111696, while the sum is 55.

The spelling of 19704077497 in words is "nineteen billion, seven hundred four million, seventy-seven thousand, four hundred ninety-seven".