20102653 has 4 divisors (see below), whose sum is σ = 21285180. Its totient is φ = 18920128.

The previous prime is 20102647. The next prime is 20102659. The reversal of 20102653 is 35620102.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20102647) and next prime (20102659).

It can be written as a sum of positive squares in 2 ways, for example, as 13227769 + 6874884 = 3637^2 + 2622^2 .

It is a cyclic number.

It is not a de Polignac number, because 20102653 - 2¹³ = 20094461 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 20102653.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20102659) 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 3 ways as a sum of consecutive naturals, for example, 591238 + ... + 591271.

It is an arithmetic number, because the mean of its divisors is an integer number (5321295).

Almost surely, 2^20102653 is an apocalyptic number.

It is an amenable number.

20102653 is a deficient number, since it is larger than the sum of its proper divisors (1182527).

20102653 is a wasteful number, since it uses less digits than its factorization.

20102653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1182526.

The product of its (nonzero) digits is 360, while the sum is 19.

The square root of 20102653 is about 4483.5982201799. The cubic root of 20102653 is about 271.9053745603.

Adding to 20102653 its reverse (35620102), we get a palindrome (55722755).

The spelling of 20102653 in words is "twenty million, one hundred two thousand, six hundred fifty-three".