20534025 has 12 divisors (see below), whose sum is σ = 33949712. Its totient is φ = 10951440.

The previous prime is 20533999. The next prime is 20534029. The reversal of 20534025 is 52043502.

It is not a de Polignac number, because 20534025 - 2⁷ = 20533897 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20533992 and 20534010.

It is not an unprimeable number, because it can be changed into a prime (20534029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 136819 + ... + 136968.

Almost surely, 2^20534025 is an apocalyptic number.

20534025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20534025 is a deficient number, since it is larger than the sum of its proper divisors (13415687).

20534025 is a wasteful number, since it uses less digits than its factorization.

20534025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273800 (or 273795 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 20534025 is about 4531.4484439305. The cubic root of 20534025 is about 273.8365169296.

Adding to 20534025 its reverse (52043502), we get a palindrome (72577527).

The spelling of 20534025 in words is "twenty million, five hundred thirty-four thousand, twenty-five".