20220765 has 8 divisors (see below), whose sum is σ = 32353248. Its totient is φ = 10784400.

The previous prime is 20220751. The next prime is 20220791. The reversal of 20220765 is 56702202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20220765 - 2⁷ = 20220637 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674011 + ... + 674040.

It is an arithmetic number, because the mean of its divisors is an integer number (4044156).

Almost surely, 2^20220765 is an apocalyptic number.

It is an amenable number.

20220765 is a deficient number, since it is larger than the sum of its proper divisors (12132483).

20220765 is a wasteful number, since it uses less digits than its factorization.

20220765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1348059.

The product of its (nonzero) digits is 1680, while the sum is 24.

The square root of 20220765 is about 4496.7504934119. The cubic root of 20220765 is about 272.4368565645.

Adding to 20220765 its reverse (56702202), we get a palindrome (76922967).

The spelling of 20220765 in words is "twenty million, two hundred twenty thousand, seven hundred sixty-five".