20415104 has 32 divisors (see below), whose sum is σ = 40876500. Its totient is φ = 10156032.

The previous prime is 20415103. The next prime is 20415119. The reversal of 20415104 is 40151402.

It can be written as a sum of positive squares in 2 ways, for example, as 18318400 + 2096704 = 4280^2 + 1448^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20415103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44444 + ... + 44900.

Almost surely, 2^20415104 is an apocalyptic number.

It is an amenable number.

20415104 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

20415104 is an equidigital number, since it uses as much as digits as its factorization.

20415104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 808 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 20415104 is about 4518.3076477814. The cubic root of 20415104 is about 273.3068597534.

Adding to 20415104 its reverse (40151402), we get a palindrome (60566506).

The spelling of 20415104 in words is "twenty million, four hundred fifteen thousand, one hundred four".