20165077 has 4 divisors (see below), whose sum is σ = 21351276. Its totient is φ = 18978880.

The previous prime is 20165051. The next prime is 20165081. The reversal of 20165077 is 77056102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 77056102 = 2 ⋅38528051.

It can be written as a sum of positive squares in 2 ways, for example, as 13147876 + 7017201 = 3626^2 + 2649^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20165077 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 (20165017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593074 + ... + 593107.

It is an arithmetic number, because the mean of its divisors is an integer number (5337819).

Almost surely, 2^20165077 is an apocalyptic number.

It is an amenable number.

20165077 is a deficient number, since it is larger than the sum of its proper divisors (1186199).

20165077 is a wasteful number, since it uses less digits than its factorization.

20165077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186198.

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 20165077 is about 4490.5541974237. The cubic root of 20165077 is about 272.1865295298.

The spelling of 20165077 in words is "twenty million, one hundred sixty-five thousand, seventy-seven".