20552445 has 24 divisors (see below), whose sum is σ = 36855000. Its totient is φ = 10582656.

The previous prime is 20552423. The next prime is 20552447. The reversal of 20552445 is 54425502.

It can be written as a sum of positive squares in 4 ways, for example, as 4356 + 20548089 = 66^2 + 4533^2 .

It is not a de Polignac number, because 20552445 - 2⁹ = 20551933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20552447) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6570 + ... + 9179.

It is an arithmetic number, because the mean of its divisors is an integer number (1535625).

Almost surely, 2^20552445 is an apocalyptic number.

It is an amenable number.

20552445 is a deficient number, since it is larger than the sum of its proper divisors (16302555).

20552445 is a wasteful number, since it uses less digits than its factorization.

20552445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15789 (or 15786 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 20552445 is about 4533.4804510442. The cubic root of 20552445 is about 273.9183739309.

Adding to 20552445 its reverse (54425502), we get a palindrome (74977947).

It can be divided in two parts, 205 and 52445, that added together give a triangular number (52650 = T₃₂₄).

The spelling of 20552445 in words is "twenty million, five hundred fifty-two thousand, four hundred forty-five".