20419917 has 24 divisors (see below), whose sum is σ = 32700672. Its totient is φ = 11289600.

The previous prime is 20419897. The next prime is 20419943. The reversal of 20419917 is 71991402.

It is not a de Polignac number, because 20419917 - 2¹² = 20415821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20419957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2317 + ... + 6797.

It is an arithmetic number, because the mean of its divisors is an integer number (1362528).

Almost surely, 2^20419917 is an apocalyptic number.

It is an amenable number.

20419917 is a deficient number, since it is larger than the sum of its proper divisors (12280755).

20419917 is a wasteful number, since it uses less digits than its factorization.

20419917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4529 (or 4522 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 20419917 is about 4518.8402273150. The cubic root of 20419917 is about 273.3283360511.

The spelling of 20419917 in words is "twenty million, four hundred nineteen thousand, nine hundred seventeen".