19880165 has 8 divisors (see below), whose sum is σ = 24893568. Its totient is φ = 15212560.

The previous prime is 19880149. The next prime is 19880221. The reversal of 19880165 is 56108891.

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

It is not a de Polignac number, because 19880165 - 2⁴ = 19880149 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 86321 + ... + 86550.

It is an arithmetic number, because the mean of its divisors is an integer number (3111696).

Almost surely, 2^19880165 is an apocalyptic number.

It is an amenable number.

19880165 is a deficient number, since it is larger than the sum of its proper divisors (5013403).

19880165 is a wasteful number, since it uses less digits than its factorization.

19880165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172899.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 19880165 is about 4458.7178650370. The cubic root of 19880165 is about 270.8985381990.

The spelling of 19880165 in words is "nineteen million, eight hundred eighty thousand, one hundred sixty-five".