20764653 has 32 divisors (see below), whose sum is σ = 35567616. Its totient is φ = 10473408.

The previous prime is 20764651. The next prime is 20764673. The reversal of 20764653 is 35646702.

It is not a de Polignac number, because 20764653 - 2¹ = 20764651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20764651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4626 + ... + 7932.

It is an arithmetic number, because the mean of its divisors is an integer number (1111488).

Almost surely, 2^20764653 is an apocalyptic number.

20764653 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

20764653 is a deficient number, since it is larger than the sum of its proper divisors (14802963).

20764653 is a wasteful number, since it uses less digits than its factorization.

20764653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3353.

The product of its (nonzero) digits is 30240, while the sum is 33.

The square root of 20764653 is about 4556.8248814279. The cubic root of 20764653 is about 274.8579012426.

The spelling of 20764653 in words is "twenty million, seven hundred sixty-four thousand, six hundred fifty-three".