20718248 has 16 divisors (see below), whose sum is σ = 38904180. Its totient is φ = 10343808.

The previous prime is 20718241. The next prime is 20718259. The reversal of 20718248 is 84281702.

It can be written as a sum of positive squares in 2 ways, for example, as 18164644 + 2553604 = 4262^2 + 1598^2 .

It is not an unprimeable number, because it can be changed into a prime (20718241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5540 + ... + 8492.

Almost surely, 2^20718248 is an apocalyptic number.

It is an amenable number.

20718248 is a deficient number, since it is larger than the sum of its proper divisors (18185932).

20718248 is a wasteful number, since it uses less digits than its factorization.

20718248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3836 (or 3832 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 20718248 is about 4551.7302204766. The cubic root of 20718248 is about 274.6529970365.

The spelling of 20718248 in words is "twenty million, seven hundred eighteen thousand, two hundred forty-eight".