20142917 has 4 divisors (see below), whose sum is σ = 21018720. Its totient is φ = 19267116.

The previous prime is 20142887. The next prime is 20142919. The reversal of 20142917 is 71924102.

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, and also an emirpimes, since its reverse is a distinct semiprime: 71924102 = 2 ⋅35962051.

It is a cyclic number.

It is not a de Polignac number, because 20142917 - 2¹⁰ = 20141893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20142919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 437867 + ... + 437912.

It is an arithmetic number, because the mean of its divisors is an integer number (5254680).

Almost surely, 2^20142917 is an apocalyptic number.

It is an amenable number.

20142917 is a deficient number, since it is larger than the sum of its proper divisors (875803).

20142917 is an equidigital number, since it uses as much as digits as its factorization.

20142917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 875802.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 20142917 is about 4488.0861177121. The cubic root of 20142917 is about 272.0867883734.

The spelling of 20142917 in words is "twenty million, one hundred forty-two thousand, nine hundred seventeen".