20480475 has 12 divisors (see below), whose sum is σ = 33861176. Its totient is φ = 10922880.

The previous prime is 20480431. The next prime is 20480479. The reversal of 20480475 is 57408402.

It is not a de Polignac number, because 20480475 - 2¹⁶ = 20414939 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20480479) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136462 + ... + 136611.

Almost surely, 2^20480475 is an apocalyptic number.

20480475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20480475 is a deficient number, since it is larger than the sum of its proper divisors (13380701).

20480475 is a wasteful number, since it uses less digits than its factorization.

20480475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273086 (or 273081 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 20480475 is about 4525.5358798710. The cubic root of 20480475 is about 273.5982666565.

Adding to 20480475 its reverse (57408402), we get a palindrome (77888877).

The spelling of 20480475 in words is "twenty million, four hundred eighty thousand, four hundred seventy-five".