20525475 has 24 divisors (see below), whose sum is σ = 35109360. Its totient is φ = 10568320.

The previous prime is 20525459. The next prime is 20525497. The reversal of 20525475 is 57452502.

It is not a de Polignac number, because 20525475 - 2⁴ = 20525459 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2544 + ... + 6893.

It is an arithmetic number, because the mean of its divisors is an integer number (1462890).

Almost surely, 2^20525475 is an apocalyptic number.

20525475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

20525475 is a deficient number, since it is larger than the sum of its proper divisors (14583885).

20525475 is a wasteful number, since it uses less digits than its factorization.

20525475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9479 (or 9474 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 30.

The square root of 20525475 is about 4530.5049387458. The cubic root of 20525475 is about 273.7985047806.

Adding to 20525475 its reverse (57452502), we get a palindrome (77977977).

The spelling of 20525475 in words is "twenty million, five hundred twenty-five thousand, four hundred seventy-five".