20040135 has 8 divisors (see below), whose sum is σ = 32064240. Its totient is φ = 10688064.

The previous prime is 20040133. The next prime is 20040151. The reversal of 20040135 is 53104002.

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

It is not a de Polignac number, because 20040135 - 2¹ = 20040133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 1336009 = 20040135 / (2 + 0 + 0 + 4 + 0 + 1 + 3 + 5).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20040133) 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 7 ways as a sum of consecutive naturals, for example, 667990 + ... + 668019.

It is an arithmetic number, because the mean of its divisors is an integer number (4008030).

Almost surely, 2^20040135 is an apocalyptic number.

20040135 is a deficient number, since it is larger than the sum of its proper divisors (12024105).

20040135 is a wasteful number, since it uses less digits than its factorization.

20040135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336017.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 20040135 is about 4476.6209354825. The cubic root of 20040135 is about 271.6232122566.

Adding to 20040135 its reverse (53104002), we get a palindrome (73144137).

The spelling of 20040135 in words is "twenty million, forty thousand, one hundred thirty-five".