20525105 has 8 divisors (see below), whose sum is σ = 24824832. Its totient is φ = 16290288.

The previous prime is 20525101. The next prime is 20525129. The reversal of 20525105 is 50152502.

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

It is a cyclic number.

It is not a de Polignac number, because 20525105 - 2² = 20525101 is a prime.

It is a super-2 number, since 2×20525105² = 842559870522050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20525101) 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, 15527 + ... + 16796.

It is an arithmetic number, because the mean of its divisors is an integer number (3103104).

Almost surely, 2^20525105 is an apocalyptic number.

It is an amenable number.

20525105 is a deficient number, since it is larger than the sum of its proper divisors (4299727).

20525105 is a wasteful number, since it uses less digits than its factorization.

20525105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32455.

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 20525105 is about 4530.4641042613. The cubic root of 20525105 is about 273.7968595721.

Adding to 20525105 its reverse (50152502), we get a palindrome (70677607).

The spelling of 20525105 in words is "twenty million, five hundred twenty-five thousand, one hundred five".