20214817 has 8 divisors (see below), whose sum is σ = 23133312. Its totient is φ = 17304000.

The previous prime is 20214809. The next prime is 20214829. The reversal of 20214817 is 71841202.

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 20214817 - 2³ = 20214809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20214791 and 20214800.

It is not an unprimeable number, because it can be changed into a prime (20214017) 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, 5817 + ... + 8617.

It is an arithmetic number, because the mean of its divisors is an integer number (2891664).

Almost surely, 2^20214817 is an apocalyptic number.

It is an amenable number.

20214817 is a deficient number, since it is larger than the sum of its proper divisors (2918495).

20214817 is a wasteful number, since it uses less digits than its factorization.

20214817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3839.

The product of its (nonzero) digits is 896, while the sum is 25.

The square root of 20214817 is about 4496.0890782990. The cubic root of 20214817 is about 272.4101412327.

The spelling of 20214817 in words is "twenty million, two hundred fourteen thousand, eight hundred seventeen".