20974017 has 16 divisors (see below), whose sum is σ = 28562688. Its totient is φ = 13687440.

The previous prime is 20974013. The next prime is 20974021. The reversal of 20974017 is 71047902.

It is an interprime number because it is at equal distance from previous prime (20974013) and next prime (20974021).

It is not a de Polignac number, because 20974017 - 2² = 20974013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20974013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32298 + ... + 32940.

It is an arithmetic number, because the mean of its divisors is an integer number (1785168).

Almost surely, 2^20974017 is an apocalyptic number.

It is an amenable number.

20974017 is a deficient number, since it is larger than the sum of its proper divisors (7588671).

20974017 is a wasteful number, since it uses less digits than its factorization.

20974017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 860.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 20974017 is about 4579.7398397726. The cubic root of 20974017 is about 275.7785847616.

The spelling of 20974017 in words is "twenty million, nine hundred seventy-four thousand, seventeen".