20552425 has 12 divisors (see below), whose sum is σ = 25904716. Its totient is φ = 16171200.

The previous prime is 20552423. The next prime is 20552447. The reversal of 20552425 is 52425502.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2396304 + 18156121 = 1548^2 + 4261^2 .

It is not a de Polignac number, because 20552425 - 2¹ = 20552423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20552425.

It is not an unprimeable number, because it can be changed into a prime (20552423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5214 + ... + 8263.

Almost surely, 2^20552425 is an apocalyptic number.

20552425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20552425 is a deficient number, since it is larger than the sum of its proper divisors (5352291).

20552425 is a wasteful number, since it uses less digits than its factorization.

20552425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13548 (or 13543 counting only the distinct ones).

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

The square root of 20552425 is about 4533.4782452329. The cubic root of 20552425 is about 273.9182850790.

Adding to 20552425 its reverse (52425502), we get a palindrome (72977927).

The spelling of 20552425 in words is "twenty million, five hundred fifty-two thousand, four hundred twenty-five".