20017025 has 24 divisors (see below), whose sum is σ = 28658880. Its totient is φ = 13584960.

The previous prime is 20017009. The next prime is 20017031. The reversal of 20017025 is 52071002.

It is not a de Polignac number, because 20017025 - 2⁴ = 20017009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20016994 and 20017012.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18191 + ... + 19259.

It is an arithmetic number, because the mean of its divisors is an integer number (1194120).

Almost surely, 2^20017025 is an apocalyptic number.

20017025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20017025 is a deficient number, since it is larger than the sum of its proper divisors (8641855).

20017025 is a wasteful number, since it uses less digits than its factorization.

20017025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1193 (or 1188 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 20017025 is about 4474.0390029592. The cubic root of 20017025 is about 271.5187614148.

Adding to 20017025 its reverse (52071002), we get a palindrome (72088027).

The spelling of 20017025 in words is "twenty million, seventeen thousand, twenty-five".