20530764 has 36 divisors (see below), whose sum is σ = 54951624. Its totient is φ = 6440832.

The previous prime is 20530759. The next prime is 20530771. The reversal of 20530764 is 46703502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16162 + ... + 17385.

It is an arithmetic number, because the mean of its divisors is an integer number (1526434).

Almost surely, 2^20530764 is an apocalyptic number.

It is an amenable number.

20530764 is an abundant number, since it is smaller than the sum of its proper divisors (34420860).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20530764 is a wasteful number, since it uses less digits than its factorization.

20530764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33574 (or 33569 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 20530764 is about 4531.0886109190. The cubic root of 20530764 is about 273.8220202075.

The spelling of 20530764 in words is "twenty million, five hundred thirty thousand, seven hundred sixty-four".