20262171 has 4 divisors (see below), whose sum is σ = 27016232. Its totient is φ = 13508112.

The previous prime is 20262167. The next prime is 20262173. The reversal of 20262171 is 17126202.

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

It is not a de Polignac number, because 20262171 - 2² = 20262167 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20262173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3377026 + ... + 3377031.

It is an arithmetic number, because the mean of its divisors is an integer number (6754058).

Almost surely, 2^20262171 is an apocalyptic number.

20262171 is a deficient number, since it is larger than the sum of its proper divisors (6754061).

20262171 is an equidigital number, since it uses as much as digits as its factorization.

20262171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6754060.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 20262171 is about 4501.3521301938. The cubic root of 20262171 is about 272.6226858269.

Adding to 20262171 its reverse (17126202), we get a palindrome (37388373).

The spelling of 20262171 in words is "twenty million, two hundred sixty-two thousand, one hundred seventy-one".