20530608 has 160 divisors (see below), whose sum is σ = 65472000. Its totient is φ = 5531904.

The previous prime is 20530603. The next prime is 20530613. The reversal of 20530608 is 80603502.

It is an interprime number because it is at equal distance from previous prime (20530603) and next prime (20530613).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (20530603) 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 31 ways as a sum of consecutive naturals, for example, 477435 + ... + 477477.

It is an arithmetic number, because the mean of its divisors is an integer number (409200).

Almost surely, 2^20530608 is an apocalyptic number.

20530608 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20530608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32736000).

20530608 is an abundant number, since it is smaller than the sum of its proper divisors (44941392).

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

20530608 is a wasteful number, since it uses less digits than its factorization.

20530608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 20530608 is about 4531.0713964801. The cubic root of 20530608 is about 273.8213266736.

The spelling of 20530608 in words is "twenty million, five hundred thirty thousand, six hundred eight".