20530488 has 64 divisors (see below), whose sum is σ = 58953600. Its totient is φ = 5892480.

The previous prime is 20530487. The next prime is 20530519. The reversal of 20530488 is 88403502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20530481) 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 15 ways as a sum of consecutive naturals, for example, 2970 + ... + 7062.

It is an arithmetic number, because the mean of its divisors is an integer number (921150).

Almost surely, 2^20530488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20530488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29476800).

20530488 is an abundant number, since it is smaller than the sum of its proper divisors (38423112).

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

20530488 is a wasteful number, since it uses less digits than its factorization.

20530488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4132 (or 4128 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 30.

The square root of 20530488 is about 4531.0581545595. The cubic root of 20530488 is about 273.8207931836.

The spelling of 20530488 in words is "twenty million, five hundred thirty thousand, four hundred eighty-eight".