20404132 has 24 divisors (see below), whose sum is σ = 40974080. Its totient is φ = 8709120.

The previous prime is 20404127. The next prime is 20404133. The reversal of 20404132 is 23140402.

It is not an unprimeable number, because it can be changed into a prime (20404133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6244 + ... + 8932.

Almost surely, 2^20404132 is an apocalyptic number.

It is an amenable number.

20404132 is an abundant number, since it is smaller than the sum of its proper divisors (20569948).

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

20404132 is a wasteful number, since it uses less digits than its factorization.

20404132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2971 (or 2969 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20404132 is about 4517.0933131827. The cubic root of 20404132 is about 273.2578884910.

Adding to 20404132 its reverse (23140402), we get a palindrome (43544534).

The spelling of 20404132 in words is "twenty million, four hundred four thousand, one hundred thirty-two".