20125535 has 8 divisors (see below), whose sum is σ = 25571376. Its totient is φ = 15153280.

The previous prime is 20125519. The next prime is 20125537. The reversal of 20125535 is 53552102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20125535 - 2⁴ = 20125519 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20125535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20125537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 118301 + ... + 118470.

It is an arithmetic number, because the mean of its divisors is an integer number (3196422).

Almost surely, 2^20125535 is an apocalyptic number.

20125535 is a deficient number, since it is larger than the sum of its proper divisors (5445841).

20125535 is a wasteful number, since it uses less digits than its factorization.

20125535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236793.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 20125535 is about 4486.1492396041. The cubic root of 20125535 is about 272.0085015725.

Adding to 20125535 its reverse (53552102), we get a palindrome (73677637).

The spelling of 20125535 in words is "twenty million, one hundred twenty-five thousand, five hundred thirty-five".