20289536 has 24 divisors (see below), whose sum is σ = 40573260. Its totient is φ = 10143744.

The previous prime is 20289527. The next prime is 20289541. The reversal of 20289536 is 63598202.

It is a junction number, because it is equal to n+sod(n) for n = 20289496 and 20289505.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2906 + ... + 7001.

Almost surely, 2^20289536 is an apocalyptic number.

It is an amenable number.

20289536 is a deficient number, since it is larger than the sum of its proper divisors (20283724).

20289536 is an frugal number, since it uses more digits than its factorization.

20289536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9929 (or 9909 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 20289536 is about 4504.3907468158. The cubic root of 20289536 is about 272.7453604704.

The spelling of 20289536 in words is "twenty million, two hundred eighty-nine thousand, five hundred thirty-six".