20289004 has 12 divisors (see below), whose sum is σ = 36651328. Its totient is φ = 9817200.

The previous prime is 20288999. The next prime is 20289011. The reversal of 20289004 is 40098202.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20289004.

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, 81687 + ... + 81934.

Almost surely, 2^20289004 is an apocalyptic number.

It is an amenable number.

20289004 is a deficient number, since it is larger than the sum of its proper divisors (16362324).

20289004 is a wasteful number, since it uses less digits than its factorization.

20289004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163656 (or 163654 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 20289004 is about 4504.3316929374. The cubic root of 20289004 is about 272.7429766176.

The spelling of 20289004 in words is "twenty million, two hundred eighty-nine thousand, four".