20187417 has 8 divisors (see below), whose sum is σ = 27784960. Its totient is φ = 13024080.

The previous prime is 20187413. The next prime is 20187421. The reversal of 20187417 is 71478102.

It is an interprime number because it is at equal distance from previous prime (20187413) and next prime (20187421).

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

It is not a de Polignac number, because 20187417 - 2² = 20187413 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20187413) 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, 108442 + ... + 108627.

It is an arithmetic number, because the mean of its divisors is an integer number (3473120).

Almost surely, 2^20187417 is an apocalyptic number.

It is an amenable number.

20187417 is a deficient number, since it is larger than the sum of its proper divisors (7597543).

20187417 is a wasteful number, since it uses less digits than its factorization.

20187417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217103.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 20187417 is about 4493.0409524063. The cubic root of 20187417 is about 272.2870069205.

The spelling of 20187417 in words is "twenty million, one hundred eighty-seven thousand, four hundred seventeen".