20425552 has 30 divisors (see below), whose sum is σ = 46037418. Its totient is φ = 8753472.

The previous prime is 20425549. The next prime is 20425571. The reversal of 20425552 is 25552402.

It is a happy number.

20425552 is nontrivially palindromic in base 13.

It can be written as a sum of positive squares in only one way, i.e., 19571776 + 853776 = 4424^2 + 924^2 .

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

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 5 ways as a sum of consecutive naturals, for example, 12243 + ... + 13810.

Almost surely, 2^20425552 is an apocalyptic number.

It is an amenable number.

20425552 is an abundant number, since it is smaller than the sum of its proper divisors (25611866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20425552 is a wasteful number, since it uses less digits than its factorization.

20425552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26075 (or 26062 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 25.

The square root of 20425552 is about 4519.4636849963. The cubic root of 20425552 is about 273.3534759431.

Adding to 20425552 its reverse (25552402), we get a palindrome (45977954).

The spelling of 20425552 in words is "twenty million, four hundred twenty-five thousand, five hundred fifty-two".