20730532 has 12 divisors (see below), whose sum is σ = 36395100. Its totient is φ = 10331936.

The previous prime is 20730529. The next prime is 20730533. The reversal of 20730532 is 23503702.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2119936 + 18610596 = 1456^2 + 4314^2 .

It is not an unprimeable number, because it can be changed into a prime (20730533) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 6907 + ... + 9442.

It is an arithmetic number, because the mean of its divisors is an integer number (3032925).

Almost surely, 2^20730532 is an apocalyptic number.

It is an amenable number.

20730532 is a deficient number, since it is larger than the sum of its proper divisors (15664568).

20730532 is a wasteful number, since it uses less digits than its factorization.

20730532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16670 (or 16668 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 22.

The square root of 20730532 is about 4553.0793975067. The cubic root of 20730532 is about 274.7072675656.

The spelling of 20730532 in words is "twenty million, seven hundred thirty thousand, five hundred thirty-two".