20485017 has 48 divisors (see below), whose sum is σ = 37020672. Its totient is φ = 10644480.

The previous prime is 20485009. The next prime is 20485033. The reversal of 20485017 is 71058402.

It is not a de Polignac number, because 20485017 - 2³ = 20485009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20485007) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32893 + ... + 33509.

It is an arithmetic number, because the mean of its divisors is an integer number (771264).

Almost surely, 2^20485017 is an apocalyptic number.

It is an amenable number.

20485017 is a deficient number, since it is larger than the sum of its proper divisors (16535655).

20485017 is a wasteful number, since it uses less digits than its factorization.

20485017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 20485017 is about 4526.0376710761. The cubic root of 20485017 is about 273.6184906581.

The spelling of 20485017 in words is "twenty million, four hundred eighty-five thousand, seventeen".