20213017 has 16 divisors (see below), whose sum is σ = 24580800. Its totient is φ = 16381440.

The previous prime is 20212991. The next prime is 20213047. The reversal of 20213017 is 71031202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20213017 - 2⁷ = 20212889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20213047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 709 + ... + 6397.

It is an arithmetic number, because the mean of its divisors is an integer number (1536300).

Almost surely, 2^20213017 is an apocalyptic number.

It is an amenable number.

20213017 is a deficient number, since it is larger than the sum of its proper divisors (4367783).

20213017 is a wasteful number, since it uses less digits than its factorization.

20213017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5736.

The product of its (nonzero) digits is 84, while the sum is 16.

The square root of 20213017 is about 4495.8888998729. Note that the first 4 decimals coincide. The cubic root of 20213017 is about 272.4020555332.

Adding to 20213017 its reverse (71031202), we get a palindrome (91244219).

The spelling of 20213017 in words is "twenty million, two hundred thirteen thousand, seventeen".