20525470 has 16 divisors (see below), whose sum is σ = 42223968. Its totient is φ = 7037280.

The previous prime is 20525459. The next prime is 20525497. The reversal of 20525470 is 7452502.

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 7 ways as a sum of consecutive naturals, for example, 146541 + ... + 146680.

It is an arithmetic number, because the mean of its divisors is an integer number (2638998).

Almost surely, 2^20525470 is an apocalyptic number.

20525470 is an abundant number, since it is smaller than the sum of its proper divisors (21698498).

20525470 is a wasteful number, since it uses less digits than its factorization.

20525470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293235.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 20525470 is about 4530.5043869309. The cubic root of 20525470 is about 273.7984825481.

Adding to 20525470 its reverse (7452502), we get a palindrome (27977972).

The spelling of 20525470 in words is "twenty million, five hundred twenty-five thousand, four hundred seventy".