20130412 has 6 divisors (see below), whose sum is σ = 35228228. Its totient is φ = 10065204.

The previous prime is 20130403. The next prime is 20130413. The reversal of 20130412 is 21403102.

It is a junction number, because it is equal to n+sod(n) for n = 20130392 and 20130401.

It is not an unprimeable number, because it can be changed into a prime (20130413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2516298 + ... + 2516305.

Almost surely, 2^20130412 is an apocalyptic number.

It is an amenable number.

20130412 is a deficient number, since it is larger than the sum of its proper divisors (15097816).

20130412 is a wasteful number, since it uses less digits than its factorization.

20130412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5032607 (or 5032605 counting only the distinct ones).

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

The square root of 20130412 is about 4486.6927686214. The cubic root of 20130412 is about 272.0304716439.

Adding to 20130412 its reverse (21403102), we get a palindrome (41533514).

The spelling of 20130412 in words is "twenty million, one hundred thirty thousand, four hundred twelve".