19413985 has 8 divisors (see below), whose sum is σ = 23616360. Its totient is φ = 15318144.

The previous prime is 19413971. The next prime is 19413997. The reversal of 19413985 is 58931491.

It can be written as a sum of positive squares in 4 ways, for example, as 7573504 + 11840481 = 2752^2 + 3441^2 .

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 19413985 - 2⁷ = 19413857 is a prime.

It is a super-3 number, since 3×19413985³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26230 + ... + 26959.

It is an arithmetic number, because the mean of its divisors is an integer number (2952045).

Almost surely, 2^19413985 is an apocalyptic number.

It is an amenable number.

19413985 is a deficient number, since it is larger than the sum of its proper divisors (4202375).

19413985 is an equidigital number, since it uses as much as digits as its factorization.

19413985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53267.

The product of its digits is 38880, while the sum is 40.

The square root of 19413985 is about 4406.1303884474. The cubic root of 19413985 is about 268.7642891267.

The spelling of 19413985 in words is "nineteen million, four hundred thirteen thousand, nine hundred eighty-five".