20415004 has 6 divisors (see below), whose sum is σ = 35726264. Its totient is φ = 10207500.

The previous prime is 20414993. The next prime is 20415013. The reversal of 20415004 is 40051402.

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, 2551872 + ... + 2551879.

Almost surely, 2^20415004 is an apocalyptic number.

It is an amenable number.

20415004 is a deficient number, since it is larger than the sum of its proper divisors (15311260).

20415004 is a wasteful number, since it uses less digits than its factorization.

20415004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5103755 (or 5103753 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 20415004 is about 4518.2965816777. The cubic root of 20415004 is about 273.3064135032.

Adding to 20415004 its reverse (40051402), we get a palindrome (60466406).

The spelling of 20415004 in words is "twenty million, four hundred fifteen thousand, four".