20017459 has 8 divisors (see below), whose sum is σ = 24956928. Its totient is φ = 15597960.

The previous prime is 20017457. The next prime is 20017477. The reversal of 20017459 is 95471002.

It is a happy number.

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

It is not a de Polignac number, because 20017459 - 2¹ = 20017457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20017451) 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, 129907 + ... + 130060.

It is an arithmetic number, because the mean of its divisors is an integer number (3119616).

Almost surely, 2^20017459 is an apocalyptic number.

20017459 is a deficient number, since it is larger than the sum of its proper divisors (4939469).

20017459 is a wasteful number, since it uses less digits than its factorization.

20017459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259985.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 20017459 is about 4474.0875047321. The cubic root of 20017459 is about 271.5207237159.

The spelling of 20017459 in words is "twenty million, seventeen thousand, four hundred fifty-nine".