20522475 has 36 divisors (see below), whose sum is σ = 37024416. Its totient is φ = 10866240.

The previous prime is 20522449. The next prime is 20522477. The reversal of 20522475 is 57422502.

It is not a de Polignac number, because 20522475 - 2⁸ = 20522219 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20522477) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 44094 + ... + 44556.

It is an arithmetic number, because the mean of its divisors is an integer number (1028456).

Almost surely, 2^20522475 is an apocalyptic number.

20522475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20522475 is a deficient number, since it is larger than the sum of its proper divisors (16501941).

20522475 is a wasteful number, since it uses less digits than its factorization.

20522475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 668 counting only the distinct ones).

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

The square root of 20522475 is about 4530.1738377241. The cubic root of 20522475 is about 273.7851646827.

Adding to 20522475 its sum of digits (27), we get a palindrome (20522502).

Adding to 20522475 its reverse (57422502), we get a palindrome (77944977).

The spelling of 20522475 in words is "twenty million, five hundred twenty-two thousand, four hundred seventy-five".