19800385 has 8 divisors (see below), whose sum is σ = 25920576. Its totient is φ = 14400240.

The previous prime is 19800383. The next prime is 19800421. The reversal of 19800385 is 58300891.

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

It is not a de Polignac number, because 19800385 - 2¹ = 19800383 is a prime.

It is a super-2 number, since 2×19800385² = 784110492296450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19800385.

It is not an unprimeable number, because it can be changed into a prime (19800383) 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, 179949 + ... + 180058.

It is an arithmetic number, because the mean of its divisors is an integer number (3240072).

Almost surely, 2^19800385 is an apocalyptic number.

It is an amenable number.

19800385 is a deficient number, since it is larger than the sum of its proper divisors (6120191).

19800385 is a wasteful number, since it uses less digits than its factorization.

19800385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360023.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 19800385 is about 4449.7623532049. The cubic root of 19800385 is about 270.5356763488.

The spelling of 19800385 in words is "nineteen million, eight hundred thousand, three hundred eighty-five".