20764065 has 16 divisors (see below), whose sum is σ = 37968768. Its totient is φ = 9492096.

The previous prime is 20764063. The next prime is 20764091. The reversal of 20764065 is 56046702.

It is not a de Polignac number, because 20764065 - 2¹ = 20764063 is a prime.

It is a super-2 number, since 2×20764065² = 862292790648450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20764063) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 98772 + ... + 98981.

It is an arithmetic number, because the mean of its divisors is an integer number (2373048).

Almost surely, 2^20764065 is an apocalyptic number.

It is an amenable number.

20764065 is a deficient number, since it is larger than the sum of its proper divisors (17204703).

20764065 is a wasteful number, since it uses less digits than its factorization.

20764065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197768.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 20764065 is about 4556.7603623627. The cubic root of 20764065 is about 274.8553068021.

The spelling of 20764065 in words is "twenty million, seven hundred sixty-four thousand, sixty-five".