20755611 has 6 divisors (see below), whose sum is σ = 29980340. Its totient is φ = 13837068.

The previous prime is 20755597. The next prime is 20755613. The reversal of 20755611 is 11655702.

It is not a de Polignac number, because 20755611 - 2⁶ = 20755547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20755613) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1153081 + ... + 1153098.

Almost surely, 2^20755611 is an apocalyptic number.

20755611 is a deficient number, since it is larger than the sum of its proper divisors (9224729).

20755611 is a wasteful number, since it uses less digits than its factorization.

20755611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2306185 (or 2306182 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 27.

The square root of 20755611 is about 4555.8326352051. The cubic root of 20755611 is about 274.8179996854.

Subtracting from 20755611 its reverse (11655702), we obtain a palindrome (9099909).

The spelling of 20755611 in words is "twenty million, seven hundred fifty-five thousand, six hundred eleven".