20539008 has 160 divisors (see below), whose sum is σ = 70102560. Its totient is φ = 5847552.

The previous prime is 20539003. The next prime is 20539031. The reversal of 20539008 is 80093502.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (20539003) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 72435 + ... + 72717.

It is an arithmetic number, because the mean of its divisors is an integer number (438141).

Almost surely, 2^20539008 is an apocalyptic number.

20539008 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 20539008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35051280).

20539008 is an abundant number, since it is smaller than the sum of its proper divisors (49563552).

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

20539008 is an equidigital number, since it uses as much as digits as its factorization.

20539008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 20539008 is about 4531.9982347746. The cubic root of 20539008 is about 273.8586658101.

The spelling of 20539008 in words is "twenty million, five hundred thirty-nine thousand, eight".