20755065 has 16 divisors (see below), whose sum is σ = 33835968. Its totient is φ = 10860096.

The previous prime is 20755057. The next prime is 20755069. The reversal of 20755065 is 56055702.

It is not a de Polignac number, because 20755065 - 2³ = 20755057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20755069) 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, 12259 + ... + 13848.

It is an arithmetic number, because the mean of its divisors is an integer number (2114748).

Almost surely, 2^20755065 is an apocalyptic number.

It is an amenable number.

20755065 is a deficient number, since it is larger than the sum of its proper divisors (13080903).

20755065 is a wasteful number, since it uses less digits than its factorization.

20755065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26168.

The product of its (nonzero) digits is 10500, while the sum is 30.

The square root of 20755065 is about 4555.7727116264. The cubic root of 20755065 is about 274.8155898641.

It can be divided in two parts, 2075 and 5065, that added together give a triangular number (7140 = T₁₁₉).

The spelling of 20755065 in words is "twenty million, seven hundred fifty-five thousand, sixty-five".