20504932 has 36 divisors (see below), whose sum is σ = 42014700. Its totient is φ = 8730624.

The previous prime is 20504923. The next prime is 20504959. The reversal of 20504932 is 23940502.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 8156736 + 12348196 = 2856^2 + 3514^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20504897 and 20504906.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45444 + ... + 45892.

It is an arithmetic number, because the mean of its divisors is an integer number (1167075).

Almost surely, 2^20504932 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 20504932, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21007350).

20504932 is an abundant number, since it is smaller than the sum of its proper divisors (21509768).

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

20504932 is a wasteful number, since it uses less digits than its factorization.

20504932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700 (or 691 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 20504932 is about 4528.2371846006. The cubic root of 20504932 is about 273.7071301967.

The spelling of 20504932 in words is "twenty million, five hundred four thousand, nine hundred thirty-two".