20017465 has 16 divisors (see below), whose sum is σ = 25962048. Its totient is φ = 14728896.

The previous prime is 20017457. The next prime is 20017477. The reversal of 20017465 is 56471002.

It is not a de Polignac number, because 20017465 - 2³ = 20017457 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35274 + ... + 35836.

It is an arithmetic number, because the mean of its divisors is an integer number (1622628).

Almost surely, 2^20017465 is an apocalyptic number.

It is an amenable number.

20017465 is a deficient number, since it is larger than the sum of its proper divisors (5944583).

20017465 is a wasteful number, since it uses less digits than its factorization.

20017465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1128.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 20017465 is about 4474.0881752598. The cubic root of 20017465 is about 271.5207508443.

Adding to 20017465 its reverse (56471002), we get a palindrome (76488467).

The spelling of 20017465 in words is "twenty million, seventeen thousand, four hundred sixty-five".