20275765 has 16 divisors (see below), whose sum is σ = 25573248. Its totient is φ = 15402816.

The previous prime is 20275693. The next prime is 20275769. The reversal of 20275765 is 56757202.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20275765 - 2⁹ = 20275253 is a prime.

It is a super-2 number, since 2×20275765² = 822213292670450, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20275765.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20275769) 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, 17494 + ... + 18616.

It is an arithmetic number, because the mean of its divisors is an integer number (1598328).

Almost surely, 2^20275765 is an apocalyptic number.

It is an amenable number.

20275765 is a deficient number, since it is larger than the sum of its proper divisors (5297483).

20275765 is a wasteful number, since it uses less digits than its factorization.

20275765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308.

The product of its (nonzero) digits is 29400, while the sum is 34.

The square root of 20275765 is about 4502.8618677459. The cubic root of 20275765 is about 272.6836402083.

The spelling of 20275765 in words is "twenty million, two hundred seventy-five thousand, seven hundred sixty-five".