20130401 has 4 divisors (see below), whose sum is σ = 20162352. Its totient is φ = 20098452.

The previous prime is 20130391. The next prime is 20130403. The reversal of 20130401 is 10403102.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20130401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20130403) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 15011 + ... + 16296.

It is an arithmetic number, because the mean of its divisors is an integer number (5040588).

Almost surely, 2^20130401 is an apocalyptic number.

It is an amenable number.

20130401 is a deficient number, since it is larger than the sum of its proper divisors (31951).

20130401 is an equidigital number, since it uses as much as digits as its factorization.

20130401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31950.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 20130401 is about 4486.6915427740. The cubic root of 20130401 is about 272.0304220947.

Adding to 20130401 its reverse (10403102), we get a palindrome (30533503).

The spelling of 20130401 in words is "twenty million, one hundred thirty thousand, four hundred one".