20523125 has 20 divisors (see below), whose sum is σ = 29315616. Its totient is φ = 14070000.

The previous prime is 20523119. The next prime is 20523127. The reversal of 20523125 is 52132502.

It is not a de Polignac number, because 20523125 - 2¹² = 20519029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20523097 and 20523106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20523127) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2030 + ... + 6720.

Almost surely, 2^20523125 is an apocalyptic number.

20523125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20523125 is a deficient number, since it is larger than the sum of its proper divisors (8792491).

20523125 is an frugal number, since it uses more digits than its factorization.

20523125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4718 (or 4703 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20523125 is about 4530.2455783324. The cubic root of 20523125 is about 273.7880551475.

Adding to 20523125 its reverse (52132502), we get a palindrome (72655627).

The spelling of 20523125 in words is "twenty million, five hundred twenty-three thousand, one hundred twenty-five".