20117275 has 12 divisors (see below), whose sum is σ = 25001872. Its totient is φ = 16057440.

The previous prime is 20117261. The next prime is 20117287. The reversal of 20117275 is 57271102.

It is a happy number.

It is not a de Polignac number, because 20117275 - 2⁵ = 20117243 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18394 + ... + 19456.

Almost surely, 2^20117275 is an apocalyptic number.

20117275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20117275 is a deficient number, since it is larger than the sum of its proper divisors (4884597).

20117275 is a wasteful number, since it uses less digits than its factorization.

20117275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1830 (or 1825 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 20117275 is about 4485.2285337539. The cubic root of 20117275 is about 271.9712835528.

Adding to 20117275 its reverse (57271102), we get a palindrome (77388377).

The spelling of 20117275 in words is "twenty million, one hundred seventeen thousand, two hundred seventy-five".