20793808 has 80 divisors (see below), whose sum is σ = 48854016. Its totient is φ = 8386560.

The previous prime is 20793803. The next prime is 20793833. The reversal of 20793808 is 80839702.

It is a super-2 number, since 2×20793808² = 864764902281728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20793803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183960 + ... + 184072.

Almost surely, 2^20793808 is an apocalyptic number.

20793808 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 20793808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24427008).

20793808 is an abundant number, since it is smaller than the sum of its proper divisors (28060208).

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

20793808 is a wasteful number, since it uses less digits than its factorization.

20793808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 206 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20793808 is about 4560.0228069605. The cubic root of 20793808 is about 274.9864808781.

The spelling of 20793808 in words is "twenty million, seven hundred ninety-three thousand, eight hundred eight".