20936484 has 36 divisors (see below), whose sum is σ = 53926236. Its totient is φ = 6846528.

The previous prime is 20936483. The next prime is 20936497. The reversal of 20936484 is 48463902.

It is a happy number.

20936484 is a `hidden beast` number, since 2 + 0 + 9 + 3 + 648 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 13483584 + 7452900 = 3672^2 + 2730^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (20936483) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3579 + ... + 7394.

It is an arithmetic number, because the mean of its divisors is an integer number (1497951).

Almost surely, 2^20936484 is an apocalyptic number.

It is an amenable number.

20936484 is an abundant number, since it is smaller than the sum of its proper divisors (32989752).

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

20936484 is a wasteful number, since it uses less digits than its factorization.

20936484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11036 (or 11031 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 20936484 is about 4575.6402830642. The cubic root of 20936484 is about 275.6139846277.

The spelling of 20936484 in words is "twenty million, nine hundred thirty-six thousand, four hundred eighty-four".