20733808 has 20 divisors (see below), whose sum is σ = 40296528. Its totient is φ = 10334720.

The previous prime is 20733799. The next prime is 20733821. The reversal of 20733808 is 80833702.

It is a self number, because there is not a number n which added to its sum of digits gives 20733808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3813 + ... + 7483.

Almost surely, 2^20733808 is an apocalyptic number.

It is an amenable number.

20733808 is a deficient number, since it is larger than the sum of its proper divisors (19562720).

20733808 is a wasteful number, since it uses less digits than its factorization.

20733808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4032 (or 4026 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 20733808 is about 4553.4391398151. The cubic root of 20733808 is about 274.7217372636.

The spelling of 20733808 in words is "twenty million, seven hundred thirty-three thousand, eight hundred eight".