20718496 has 12 divisors (see below), whose sum is σ = 40789602. Its totient is φ = 10359232.

The previous prime is 20718491. The next prime is 20718497. The reversal of 20718496 is 69481702.

It can be written as a sum of positive squares in only one way, i.e., 19678096 + 1040400 = 4436^2 + 1020^2 .

It is not an unprimeable number, because it can be changed into a prime (20718491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 323695 + ... + 323758.

Almost surely, 2^20718496 is an apocalyptic number.

It is an amenable number.

20718496 is a deficient number, since it is larger than the sum of its proper divisors (20071106).

20718496 is an equidigital number, since it uses as much as digits as its factorization.

20718496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647463 (or 647455 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 20718496 is about 4551.7574627829. The cubic root of 20718496 is about 274.6540929090.

The spelling of 20718496 in words is "twenty million, seven hundred eighteen thousand, four hundred ninety-six".