20203917 has 8 divisors (see below), whose sum is σ = 27340896. Its totient is φ = 13268112.

The previous prime is 20203907. The next prime is 20203919. The reversal of 20203917 is 71930202.

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

It is not a de Polignac number, because 20203917 - 2¹² = 20199821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20203919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50058 + ... + 50459.

It is an arithmetic number, because the mean of its divisors is an integer number (3417612).

Almost surely, 2^20203917 is an apocalyptic number.

It is an amenable number.

20203917 is a deficient number, since it is larger than the sum of its proper divisors (7136979).

20203917 is a wasteful number, since it uses less digits than its factorization.

20203917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100587.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 20203917 is about 4494.8767502569. The cubic root of 20203917 is about 272.3611704805.

The spelling of 20203917 in words is "twenty million, two hundred three thousand, nine hundred seventeen".