20001711 has 16 divisors (see below), whose sum is σ = 27260928. Its totient is φ = 13041600.

The previous prime is 20001703. The next prime is 20001763. The reversal of 20001711 is 11710002.

20001711 = 10² + 11² + ... + 391².

It is not a de Polignac number, because 20001711 - 2³ = 20001703 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20001811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38131 + ... + 38651.

It is an arithmetic number, because the mean of its divisors is an integer number (1703808).

Almost surely, 2^20001711 is an apocalyptic number.

20001711 is a deficient number, since it is larger than the sum of its proper divisors (7259217).

20001711 is a wasteful number, since it uses less digits than its factorization.

20001711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782.

The product of its (nonzero) digits is 14, while the sum is 12.

The square root of 20001711 is about 4472.3272465239. The cubic root of 20001711 is about 271.4495020530.

Adding to 20001711 its reverse (11710002), we get a palindrome (31711713).

It can be divided in two parts, 200017 and 11, that added together give a triangular number (200028 = T₆₃₂).

The spelling of 20001711 in words is "twenty million, one thousand, seven hundred eleven".