20473135 has 4 divisors (see below), whose sum is σ = 24567768. Its totient is φ = 16378504.

The previous prime is 20473129. The next prime is 20473139. The reversal of 20473135 is 53137402.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20473135 - 2⁷ = 20473007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20473139) 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, 2047309 + ... + 2047318.

It is an arithmetic number, because the mean of its divisors is an integer number (6141942).

Almost surely, 2^20473135 is an apocalyptic number.

20473135 is a deficient number, since it is larger than the sum of its proper divisors (4094633).

20473135 is an equidigital number, since it uses as much as digits as its factorization.

20473135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4094632.

The product of its (nonzero) digits is 2520, while the sum is 25.

The square root of 20473135 is about 4524.7248535132. The cubic root of 20473135 is about 273.5655777788.

The spelling of 20473135 in words is "twenty million, four hundred seventy-three thousand, one hundred thirty-five".