20838525 has 12 divisors (see below), whose sum is σ = 34453152. Its totient is φ = 11113840.

The previous prime is 20838509. The next prime is 20838527. The reversal of 20838525 is 52583802.

It is not a de Polignac number, because 20838525 - 2⁴ = 20838509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20838527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 138849 + ... + 138998.

It is an arithmetic number, because the mean of its divisors is an integer number (2871096).

Almost surely, 2^20838525 is an apocalyptic number.

20838525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

20838525 is a deficient number, since it is larger than the sum of its proper divisors (13614627).

20838525 is a wasteful number, since it uses less digits than its factorization.

20838525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277860 (or 277855 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 20838525 is about 4564.9233290385. The cubic root of 20838525 is about 275.1834588504.

The spelling of 20838525 in words is "twenty million, eight hundred thirty-eight thousand, five hundred twenty-five".