20320788 has 24 divisors (see below), whose sum is σ = 47537280. Its totient is φ = 6756160.

The previous prime is 20320787. The next prime is 20320829. The reversal of 20320788 is 88702302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20320787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3208 + ... + 7136.

It is an arithmetic number, because the mean of its divisors is an integer number (1980720).

Almost surely, 2^20320788 is an apocalyptic number.

It is an amenable number.

20320788 is an abundant number, since it is smaller than the sum of its proper divisors (27216492).

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

20320788 is a wasteful number, since it uses less digits than its factorization.

20320788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367 (or 4365 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 30.

The square root of 20320788 is about 4507.8584716027. The cubic root of 20320788 is about 272.8853253160.

The spelling of 20320788 in words is "twenty million, three hundred twenty thousand, seven hundred eighty-eight".