20140405 has 8 divisors (see below), whose sum is σ = 24343200. Its totient is φ = 15995856.

The previous prime is 20140363. The next prime is 20140411. The reversal of 20140405 is 50404102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20140405 - 2⁹ = 20139893 is a prime.

It is a congruent number.

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, 13795 + ... + 15184.

It is an arithmetic number, because the mean of its divisors is an integer number (3042900).

Almost surely, 2^20140405 is an apocalyptic number.

It is an amenable number.

20140405 is a deficient number, since it is larger than the sum of its proper divisors (4202795).

20140405 is a wasteful number, since it uses less digits than its factorization.

20140405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29123.

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

The square root of 20140405 is about 4487.8062569590. The cubic root of 20140405 is about 272.0754773598.

Adding to 20140405 its reverse (50404102), we get a palindrome (70544507).

The spelling of 20140405 in words is "twenty million, one hundred forty thousand, four hundred five".