20133525 has 24 divisors (see below), whose sum is σ = 35247744. Its totient is φ = 10105600.

The previous prime is 20133517. The next prime is 20133527. The reversal of 20133525 is 52533102.

It is not a de Polignac number, because 20133525 - 2³ = 20133517 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20133527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6621 + ... + 9170.

It is an arithmetic number, because the mean of its divisors is an integer number (1468656).

Almost surely, 2^20133525 is an apocalyptic number.

20133525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20133525 is a deficient number, since it is larger than the sum of its proper divisors (15114219).

20133525 is a wasteful number, since it uses less digits than its factorization.

20133525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15821 (or 15816 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 20133525 is about 4487.0396699829. The cubic root of 20133525 is about 272.0444933342.

Adding to 20133525 its reverse (52533102), we get a palindrome (72666627).

The spelling of 20133525 in words is "twenty million, one hundred thirty-three thousand, five hundred twenty-five".