19885069 has 4 divisors (see below), whose sum is σ = 19919196. Its totient is φ = 19850944.

The previous prime is 19885067. The next prime is 19885079. The reversal of 19885069 is 96058891.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14062500 + 5822569 = 3750^2 + 2413^2 .

It is a cyclic number.

It is not a de Polignac number, because 19885069 - 2¹ = 19885067 is a prime.

It is a super-2 number, since 2×19885069² = 790831938269522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19885067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16174 + ... + 17359.

It is an arithmetic number, because the mean of its divisors is an integer number (4979799).

Almost surely, 2^19885069 is an apocalyptic number.

It is an amenable number.

19885069 is a deficient number, since it is larger than the sum of its proper divisors (34127).

19885069 is an equidigital number, since it uses as much as digits as its factorization.

19885069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34126.

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 19885069 is about 4459.2677650036. The cubic root of 19885069 is about 270.9208112739.

The spelling of 19885069 in words is "nineteen million, eight hundred eighty-five thousand, sixty-nine".