20801008 has 20 divisors (see below), whose sum is σ = 40376880. Its totient is φ = 10381184.

The previous prime is 20801003. The next prime is 20801017. The reversal of 20801008 is 80010802.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20801003) 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, 12141 + ... + 13747.

It is an arithmetic number, because the mean of its divisors is an integer number (2018844).

Almost surely, 2^20801008 is an apocalyptic number.

It is an amenable number.

20801008 is a deficient number, since it is larger than the sum of its proper divisors (19575872).

20801008 is a wasteful number, since it uses less digits than its factorization.

20801008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2424 (or 2418 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 20801008 is about 4560.8122083682. The cubic root of 20801008 is about 275.0182158733.

The spelling of 20801008 in words is "twenty million, eight hundred one thousand, eight".