20403412 has 12 divisors (see below), whose sum is σ = 36209376. Its totient is φ = 10057880.

The previous prime is 20403407. The next prime is 20403413. The reversal of 20403412 is 21430402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20403413) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 35638 + ... + 36205.

It is an arithmetic number, because the mean of its divisors is an integer number (3017448).

Almost surely, 2^20403412 is an apocalyptic number.

It is an amenable number.

20403412 is a deficient number, since it is larger than the sum of its proper divisors (15805964).

20403412 is a wasteful number, since it uses less digits than its factorization.

20403412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71918 (or 71916 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 20403412 is about 4517.0136152108. The cubic root of 20403412 is about 273.2546743056.

Adding to 20403412 its reverse (21430402), we get a palindrome (41833814).

The spelling of 20403412 in words is "twenty million, four hundred three thousand, four hundred twelve".