20436012 has 18 divisors (see below), whose sum is σ = 51657788. Its totient is φ = 6811992.

The previous prime is 20435993. The next prime is 20436019. The reversal of 20436012 is 21063402.

It is a happy number.

20436012 is a `hidden beast` number, since 20 + 43 + 601 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

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 (20436019) 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 5 ways as a sum of consecutive naturals, for example, 283798 + ... + 283869.

Almost surely, 2^20436012 is an apocalyptic number.

It is an amenable number.

20436012 is an abundant number, since it is smaller than the sum of its proper divisors (31221776).

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

20436012 is a wasteful number, since it uses less digits than its factorization.

20436012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567677 (or 567672 counting only the distinct ones).

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

The square root of 20436012 is about 4520.6207538346. The cubic root of 20436012 is about 273.4001297522.

Adding to 20436012 its reverse (21063402), we get a palindrome (41499414).

The spelling of 20436012 in words is "twenty million, four hundred thirty-six thousand, twelve".