20479485 has 16 divisors (see below), whose sum is σ = 35288064. Its totient is φ = 10082112.

The previous prime is 20479439. The next prime is 20479489. The reversal of 20479485 is 58497402.

It is not a de Polignac number, because 20479485 - 2⁸ = 20479229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20479489) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52317 + ... + 52706.

It is an arithmetic number, because the mean of its divisors is an integer number (2205504).

Almost surely, 2^20479485 is an apocalyptic number.

It is an amenable number.

20479485 is a deficient number, since it is larger than the sum of its proper divisors (14808579).

20479485 is a wasteful number, since it uses less digits than its factorization.

20479485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105044.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 20479485 is about 4525.4264992374. The cubic root of 20479485 is about 273.5938581219.

The spelling of 20479485 in words is "twenty million, four hundred seventy-nine thousand, four hundred eighty-five".