19408407397 has 8 divisors (see below), whose sum is σ = 19656602240. Its totient is φ = 19160275680.

The previous prime is 19408407247. The next prime is 19408407401. The reversal of 19408407397 is 79370480491.

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 19408407397 - 2¹¹ = 19408405349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19408407797) 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, 1119598 + ... + 1136800.

It is an arithmetic number, because the mean of its divisors is an integer number (2457075280).

Almost surely, 2^19408407397 is an apocalyptic number.

It is an amenable number.

19408407397 is a deficient number, since it is larger than the sum of its proper divisors (248194843).

19408407397 is a wasteful number, since it uses less digits than its factorization.

19408407397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31563.

The product of its (nonzero) digits is 1524096, while the sum is 52.

The spelling of 19408407397 in words is "nineteen billion, four hundred eight million, four hundred seven thousand, three hundred ninety-seven".