20702223 has 20 divisors (see below), whose sum is σ = 31049568. Its totient is φ = 13746240.

The previous prime is 20702219. The next prime is 20702233. The reversal of 20702223 is 32220702.

It is not a de Polignac number, because 20702223 - 2² = 20702219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20702196 and 20702205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20702233) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 34615 + ... + 35207.

Almost surely, 2^20702223 is an apocalyptic number.

20702223 is a deficient number, since it is larger than the sum of its proper divisors (10347345).

20702223 is an equidigital number, since it uses as much as digits as its factorization.

20702223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1036 (or 1027 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20702223 is about 4549.9695603377. The cubic root of 20702223 is about 274.5821665697.

Adding to 20702223 its reverse (32220702), we get a palindrome (52922925).

The spelling of 20702223 in words is "twenty million, seven hundred two thousand, two hundred twenty-three".