20453525 has 12 divisors (see below), whose sum is σ = 25497252. Its totient is φ = 16275840.

The previous prime is 20453501. The next prime is 20453527. The reversal of 20453525 is 52535402.

It can be written as a sum of positive squares in 6 ways, for example, as 508369 + 19945156 = 713^2 + 4466^2 .

It is not a de Polignac number, because 20453525 - 2⁸ = 20453269 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20453494 and 20453503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453527) 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, 2849 + ... + 7001.

It is an arithmetic number, because the mean of its divisors is an integer number (2124771).

Almost surely, 2^20453525 is an apocalyptic number.

20453525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20453525 is a deficient number, since it is larger than the sum of its proper divisors (5043727).

20453525 is a wasteful number, since it uses less digits than its factorization.

20453525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4360 (or 4355 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 26.

The square root of 20453525 is about 4522.5573517646. The cubic root of 20453525 is about 273.4782058039.

Adding to 20453525 its reverse (52535402), we get a palindrome (72988927).

The spelling of 20453525 in words is "twenty million, four hundred fifty-three thousand, five hundred twenty-five".