20102135 has 16 divisors (see below), whose sum is σ = 24886656. Its totient is φ = 15579648.

The previous prime is 20102129. The next prime is 20102153. The reversal of 20102135 is 53120102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20102135 - 2⁴ = 20102119 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 26177 + ... + 26933.

It is an arithmetic number, because the mean of its divisors is an integer number (1555416).

Almost surely, 2^20102135 is an apocalyptic number.

20102135 is a deficient number, since it is larger than the sum of its proper divisors (4784521).

20102135 is a wasteful number, since it uses less digits than its factorization.

20102135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922.

The product of its (nonzero) digits is 60, while the sum is 14.

The square root of 20102135 is about 4483.5404537040. The cubic root of 20102135 is about 271.9030390776.

Adding to 20102135 its reverse (53120102), we get a palindrome (73222237).

The spelling of 20102135 in words is "twenty million, one hundred two thousand, one hundred thirty-five".