20788404 has 48 divisors (see below), whose sum is σ = 59703168. Its totient is φ = 5482368.

The previous prime is 20788403. The next prime is 20788457. The reversal of 20788404 is 40488702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20788403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8427 + ... + 10610.

It is an arithmetic number, because the mean of its divisors is an integer number (1243816).

Almost surely, 2^20788404 is an apocalyptic number.

It is an amenable number.

20788404 is an abundant number, since it is smaller than the sum of its proper divisors (38914764).

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

20788404 is a wasteful number, since it uses less digits than its factorization.

20788404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19064 (or 19062 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 20788404 is about 4559.4302275613. The cubic root of 20788404 is about 274.9626571883.

The spelling of 20788404 in words is "twenty million, seven hundred eighty-eight thousand, four hundred four".