19996385 has 8 divisors (see below), whose sum is σ = 24506496. Its totient is φ = 15656560.

The previous prime is 19996357. The next prime is 19996387. The reversal of 19996385 is 58369991.

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

It is not a de Polignac number, because 19996385 - 2⁶ = 19996321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19996387) 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, 42311 + ... + 42780.

It is an arithmetic number, because the mean of its divisors is an integer number (3063312).

Almost surely, 2^19996385 is an apocalyptic number.

It is an amenable number.

19996385 is a deficient number, since it is larger than the sum of its proper divisors (4510111).

19996385 is an equidigital number, since it uses as much as digits as its factorization.

19996385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85143.

The product of its digits is 524880, while the sum is 50.

The square root of 19996385 is about 4471.7317674476. The cubic root of 19996385 is about 271.4254063079.

The spelling of 19996385 in words is "nineteen million, nine hundred ninety-six thousand, three hundred eighty-five".