20519808 has 32 divisors (see below), whose sum is σ = 54506760. Its totient is φ = 6839808.

The previous prime is 20519801. The next prime is 20519831. The reversal of 20519808 is 80891502.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20519801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26335 + ... + 27102.

Almost surely, 2^20519808 is an apocalyptic number.

It is an amenable number.

20519808 is an abundant number, since it is smaller than the sum of its proper divisors (33986952).

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

20519808 is an equidigital number, since it uses as much as digits as its factorization.

20519808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53454 (or 53442 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 33.

The square root of 20519808 is about 4529.8794685952. The cubic root of 20519808 is about 273.7733042440.

The spelling of 20519808 in words is "twenty million, five hundred nineteen thousand, eight hundred eight".