20260571 has 4 divisors (see below), whose sum is σ = 20808192. Its totient is φ = 19712952.

The previous prime is 20260567. The next prime is 20260609. The reversal of 20260571 is 17506202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20260571 - 2² = 20260567 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20260511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273755 + ... + 273828.

It is an arithmetic number, because the mean of its divisors is an integer number (5202048).

Almost surely, 2^20260571 is an apocalyptic number.

20260571 is a deficient number, since it is larger than the sum of its proper divisors (547621).

20260571 is an equidigital number, since it uses as much as digits as its factorization.

20260571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547620.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 20260571 is about 4501.1744023088. The cubic root of 20260571 is about 272.6155097650.

Adding to 20260571 its reverse (17506202), we get a palindrome (37766773).

The spelling of 20260571 in words is "twenty million, two hundred sixty thousand, five hundred seventy-one".