20471275 has 12 divisors (see below), whose sum is σ = 27692424. Its totient is φ = 14888000.

The previous prime is 20471267. The next prime is 20471279. The reversal of 20471275 is 57217402.

It is not a de Polignac number, because 20471275 - 2³ = 20471267 is a prime.

It is a super-3 number, since 3×20471275³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20471279) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36946 + ... + 37495.

It is an arithmetic number, because the mean of its divisors is an integer number (2307702).

Almost surely, 2^20471275 is an apocalyptic number.

20471275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20471275 is a deficient number, since it is larger than the sum of its proper divisors (7221149).

20471275 is a wasteful number, since it uses less digits than its factorization.

20471275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74462 (or 74457 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 20471275 is about 4524.5193114849. The cubic root of 20471275 is about 273.5572929804.

Adding to 20471275 its reverse (57217402), we get a palindrome (77688677).

The spelling of 20471275 in words is "twenty million, four hundred seventy-one thousand, two hundred seventy-five".