20604132 has 60 divisors (see below), whose sum is σ = 56715120. Its totient is φ = 6504624.

The previous prime is 20604131. The next prime is 20604137. The reversal of 20604132 is 23140602.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20604131) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4483 + ... + 7829.

It is an arithmetic number, because the mean of its divisors is an integer number (945252).

Almost surely, 2^20604132 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 20604132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28357560).

20604132 is an abundant number, since it is smaller than the sum of its proper divisors (36110988).

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

20604132 is a wasteful number, since it uses less digits than its factorization.

20604132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3382 (or 3371 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 20604132 is about 4539.1774585270. The cubic root of 20604132 is about 274.1478059516.

Adding to 20604132 its reverse (23140602), we get a palindrome (43744734).

It can be divided in two parts, 20604 and 132, that added together give a 4-th power (20736 = 12⁴).

The spelling of 20604132 in words is "twenty million, six hundred four thousand, one hundred thirty-two".