20813417 has 4 divisors (see below), whose sum is σ = 21908880. Its totient is φ = 19717956.

The previous prime is 20813399. The next prime is 20813447. The reversal of 20813417 is 71431802.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20813417 - 2¹⁴ = 20797033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20813447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 547703 + ... + 547740.

It is an arithmetic number, because the mean of its divisors is an integer number (5477220).

Almost surely, 2^20813417 is an apocalyptic number.

It is an amenable number.

20813417 is a deficient number, since it is larger than the sum of its proper divisors (1095463).

20813417 is a wasteful number, since it uses less digits than its factorization.

20813417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095462.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 20813417 is about 4562.1723991976. The cubic root of 20813417 is about 275.0728930735.

The spelling of 20813417 in words is "twenty million, eight hundred thirteen thousand, four hundred seventeen".