20702163 has 8 divisors (see below), whose sum is σ = 27668368. Its totient is φ = 13768704.

The previous prime is 20702161. The next prime is 20702179. The reversal of 20702163 is 36120702.

It is a happy number.

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

It is not a de Polignac number, because 20702163 - 2¹ = 20702161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20702161) 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, 6670 + ... + 9267.

It is an arithmetic number, because the mean of its divisors is an integer number (3458546).

Almost surely, 2^20702163 is an apocalyptic number.

20702163 is a deficient number, since it is larger than the sum of its proper divisors (6966205).

20702163 is a wasteful number, since it uses less digits than its factorization.

20702163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16373.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 20702163 is about 4549.9629668823. The cubic root of 20702163 is about 274.5819013012.

Adding to 20702163 its reverse (36120702), we get a palindrome (56822865).

The spelling of 20702163 in words is "twenty million, seven hundred two thousand, one hundred sixty-three".