20552135 has 8 divisors (see below), whose sum is σ = 24757920. Its totient is φ = 16378144.

The previous prime is 20552117. The next prime is 20552137. The reversal of 20552135 is 53125502.

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 20552135 - 2⁶ = 20552071 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20552135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20552137) 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, 6500 + ... + 9129.

It is an arithmetic number, because the mean of its divisors is an integer number (3094740).

Almost surely, 2^20552135 is an apocalyptic number.

20552135 is a deficient number, since it is larger than the sum of its proper divisors (4205785).

20552135 is a wasteful number, since it uses less digits than its factorization.

20552135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15897.

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

The square root of 20552135 is about 4533.4462608484. The cubic root of 20552135 is about 273.9169967205.

Adding to 20552135 its reverse (53125502), we get a palindrome (73677637).

The spelling of 20552135 in words is "twenty million, five hundred fifty-two thousand, one hundred thirty-five".