20004688 has 30 divisors (see below), whose sum is σ = 42607082. Its totient is φ = 9092160.

The previous prime is 20004683. The next prime is 20004689. The reversal of 20004688 is 88640002.

It can be written as a sum of positive squares in only one way, i.e., 18593344 + 1411344 = 4312^2 + 1188^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20004683) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3231 + ... + 7102.

Almost surely, 2^20004688 is an apocalyptic number.

It is an amenable number.

20004688 is an abundant number, since it is smaller than the sum of its proper divisors (22602394).

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

20004688 is a wasteful number, since it uses less digits than its factorization.

20004688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10363 (or 10346 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 20004688 is about 4472.6600586228. The cubic root of 20004688 is about 271.4629686522.

The spelling of 20004688 in words is "twenty million, four thousand, six hundred eighty-eight".