20415124 has 6 divisors (see below), whose sum is σ = 35726474. Its totient is φ = 10207560.

The previous prime is 20415119. The next prime is 20415133. The reversal of 20415124 is 42151402.

It can be written as a sum of positive squares in only one way, i.e., 14976900 + 5438224 = 3870^2 + 2332^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2551887 + ... + 2551894.

Almost surely, 2^20415124 is an apocalyptic number.

It is an amenable number.

20415124 is a deficient number, since it is larger than the sum of its proper divisors (15311350).

20415124 is a wasteful number, since it uses less digits than its factorization.

20415124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103785 (or 5103783 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 20415124 is about 4518.3098609989. The cubic root of 20415124 is about 273.3069490033.

Adding to 20415124 its reverse (42151402), we get a palindrome (62566526).

The spelling of 20415124 in words is "twenty million, four hundred fifteen thousand, one hundred twenty-four".