20403112 has 32 divisors (see below), whose sum is σ = 40500000. Its totient is φ = 9609408.

The previous prime is 20403083. The next prime is 20403121. The reversal of 20403112 is 21130402.

It is a junction number, because it is equal to n+sod(n) for n = 20403092 and 20403101.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 40639 + ... + 41137.

It is an arithmetic number, because the mean of its divisors is an integer number (1265625).

Almost surely, 2^20403112 is an apocalyptic number.

It is an amenable number.

20403112 is a deficient number, since it is larger than the sum of its proper divisors (20096888).

20403112 is a wasteful number, since it uses less digits than its factorization.

20403112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793 (or 789 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 20403112 is about 4516.9804073075. The cubic root of 20403112 is about 273.2533350393.

Adding to 20403112 its reverse (21130402), we get a palindrome (41533514).

The spelling of 20403112 in words is "twenty million, four hundred three thousand, one hundred twelve".