20450475 has 30 divisors (see below), whose sum is σ = 37885100. Its totient is φ = 10905840.

The previous prime is 20450467. The next prime is 20450489. The reversal of 20450475 is 57405402.

It is not a de Polignac number, because 20450475 - 2³ = 20450467 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3025 + ... + 7074.

Almost surely, 2^20450475 is an apocalyptic number.

20450475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20450475 is a deficient number, since it is larger than the sum of its proper divisors (17434625).

20450475 is a wasteful number, since it uses less digits than its factorization.

20450475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10121 (or 10107 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 27.

The square root of 20450475 is about 4522.2201405947. The cubic root of 20450475 is about 273.4646115703.

Adding to 20450475 its reverse (57405402), we get a palindrome (77855877).

The spelling of 20450475 in words is "twenty million, four hundred fifty thousand, four hundred seventy-five".