20475475 has 12 divisors (see below), whose sum is σ = 25468360. Its totient is φ = 16329600.

The previous prime is 20475383. The next prime is 20475491. The reversal of 20475475 is 57457402.

It is not a de Polignac number, because 20475475 - 2¹³ = 20467283 is a prime.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 20475475.

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 11 ways as a sum of consecutive naturals, for example, 8395 + ... + 10555.

Almost surely, 2^20475475 is an apocalyptic number.

20475475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20475475 is a deficient number, since it is larger than the sum of its proper divisors (4992885).

20475475 is a wasteful number, since it uses less digits than its factorization.

20475475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550 (or 2545 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 20475475 is about 4524.9834253840. The cubic root of 20475475 is about 273.5759998769.

The spelling of 20475475 in words is "twenty million, four hundred seventy-five thousand, four hundred seventy-five".