20261711 has 8 divisors (see below), whose sum is σ = 20717424. Its totient is φ = 19811200.

The previous prime is 20261701. The next prime is 20261713. The reversal of 20261711 is 11716202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20261711 - 2¹⁰ = 20260687 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20261713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7175 + ... + 9591.

It is an arithmetic number, because the mean of its divisors is an integer number (2589678).

Almost surely, 2^20261711 is an apocalyptic number.

20261711 is a deficient number, since it is larger than the sum of its proper divisors (455713).

20261711 is a wasteful number, since it uses less digits than its factorization.

20261711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2601.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 20261711 is about 4501.3010341456. The cubic root of 20261711 is about 272.6206227478.

Adding to 20261711 its reverse (11716202), we get a palindrome (31977913).

The spelling of 20261711 in words is "twenty million, two hundred sixty-one thousand, seven hundred eleven".