20536984 has 32 divisors (see below), whose sum is σ = 41736240. Its totient is φ = 9417600.

The previous prime is 20536951. The next prime is 20536993. The reversal of 20536984 is 48963502.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 18279 + ... + 19369.

Almost surely, 2^20536984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20536984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20868120).

20536984 is an abundant number, since it is smaller than the sum of its proper divisors (21199256).

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

20536984 is a wasteful number, since it uses less digits than its factorization.

20536984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 20536984 is about 4531.7749282152. The cubic root of 20536984 is about 273.8496697874.

The spelling of 20536984 in words is "twenty million, five hundred thirty-six thousand, nine hundred eighty-four".