20124036 has 18 divisors (see below), whose sum is σ = 50869182. Its totient is φ = 6708000.

The previous prime is 20124031. The next prime is 20124079. The reversal of 20124036 is 63042102.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17690436 + 2433600 = 4206^2 + 1560^2 .

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20124031) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 279465 + ... + 279536.

Almost surely, 2^20124036 is an apocalyptic number.

It is an amenable number.

20124036 is an abundant number, since it is smaller than the sum of its proper divisors (30745146).

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

20124036 is a wasteful number, since it uses less digits than its factorization.

20124036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559011 (or 559006 counting only the distinct ones).

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

The square root of 20124036 is about 4485.9821667055. The cubic root of 20124036 is about 272.0017481145.

Adding to 20124036 its reverse (63042102), we get a palindrome (83166138).

The spelling of 20124036 in words is "twenty million, one hundred twenty-four thousand, thirty-six".