20946317 has 4 divisors (see below), whose sum is σ = 23938656. Its totient is φ = 17953980.

The previous prime is 20946313. The next prime is 20946319. The reversal of 20946317 is 71364902.

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 20946317 - 2² = 20946313 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20946311) 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, 1496159 + ... + 1496172.

It is an arithmetic number, because the mean of its divisors is an integer number (5984664).

Almost surely, 2^20946317 is an apocalyptic number.

It is an amenable number.

20946317 is a deficient number, since it is larger than the sum of its proper divisors (2992339).

20946317 is an equidigital number, since it uses as much as digits as its factorization.

20946317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2992338.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 20946317 is about 4576.7146513629. The cubic root of 20946317 is about 275.6571260349.

The spelling of 20946317 in words is "twenty million, nine hundred forty-six thousand, three hundred seventeen".