20436132 has 24 divisors (see below), whose sum is σ = 47761056. Its totient is φ = 6801088.

The previous prime is 20436113. The next prime is 20436133. The reversal of 20436132 is 23163402.

It is a happy number.

It is a super-2 number, since 2×20436132² = 835270982242848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20436099 and 20436108.

It is not an unprimeable number, because it can be changed into a prime (20436133) by changing a digit.

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, 10543 + ... + 12329.

It is an arithmetic number, because the mean of its divisors is an integer number (1990044).

Almost surely, 2^20436132 is an apocalyptic number.

It is an amenable number.

20436132 is an abundant number, since it is smaller than the sum of its proper divisors (27324924).

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

20436132 is a wasteful number, since it uses less digits than its factorization.

20436132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2747 (or 2745 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 20436132 is about 4520.6340263286. The cubic root of 20436132 is about 273.4006648852.

Adding to 20436132 its reverse (23163402), we get a palindrome (43599534).

The spelling of 20436132 in words is "twenty million, four hundred thirty-six thousand, one hundred thirty-two".