20190808 has 24 divisors (see below), whose sum is σ = 41385780. Its totient is φ = 9158480.

The previous prime is 20190763. The next prime is 20190811. The reversal of 20190808 is 80809102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41913 + ... + 42391.

Almost surely, 2^20190808 is an apocalyptic number.

It is an amenable number.

20190808 is an abundant number, since it is smaller than the sum of its proper divisors (21194972).

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

20190808 is an equidigital number, since it uses as much as digits as its factorization.

20190808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 492 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 20190808 is about 4493.4182979108. The cubic root of 20190808 is about 272.3022519540.

The spelling of 20190808 in words is "twenty million, one hundred ninety thousand, eight hundred eight".