19550065 has 8 divisors (see below), whose sum is σ = 23692968. Its totient is φ = 15484800.

The previous prime is 19550053. The next prime is 19550081. The reversal of 19550065 is 56005591.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 9809424 + 9740641 = 3132^2 + 3121^2 .

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

It is not a de Polignac number, because 19550065 - 2⁹ = 19549553 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18852 + ... + 19861.

It is an arithmetic number, because the mean of its divisors is an integer number (2961621).

Almost surely, 2^19550065 is an apocalyptic number.

It is an amenable number.

19550065 is a deficient number, since it is larger than the sum of its proper divisors (4142903).

19550065 is a wasteful number, since it uses less digits than its factorization.

19550065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38819.

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 19550065 is about 4421.5455442639. The cubic root of 19550065 is about 269.3907846364.

The spelling of 19550065 in words is "nineteen million, five hundred fifty thousand, sixty-five".