20700275 has 6 divisors (see below), whose sum is σ = 25668372. Its totient is φ = 16560200.

The previous prime is 20700269. The next prime is 20700301. The reversal of 20700275 is 57200702.

It is not a de Polignac number, because 20700275 - 2²² = 16505971 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20700275.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 413981 + ... + 414030.

It is an arithmetic number, because the mean of its divisors is an integer number (4278062).

Almost surely, 2^20700275 is an apocalyptic number.

20700275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20700275 is a deficient number, since it is larger than the sum of its proper divisors (4968097).

20700275 is an equidigital number, since it uses as much as digits as its factorization.

20700275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828021 (or 828016 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 20700275 is about 4549.7554879356. The cubic root of 20700275 is about 274.5735539224.

Adding to 20700275 its reverse (57200702), we get a palindrome (77900977).

The spelling of 20700275 in words is "twenty million, seven hundred thousand, two hundred seventy-five".