20680298 has 4 divisors (see below), whose sum is σ = 31020450. Its totient is φ = 10340148.

The previous prime is 20680271. The next prime is 20680333. The reversal of 20680298 is 89208602.

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

It can be written as a sum of positive squares in only one way, i.e., 17081689 + 3598609 = 4133^2 + 1897^2 .

It is a super-3 number, since 3×20680298³ (a number of 23 digits) contains 333 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5170073 + ... + 5170076.

Almost surely, 2^20680298 is an apocalyptic number.

20680298 is a deficient number, since it is larger than the sum of its proper divisors (10340152).

20680298 is a wasteful number, since it uses less digits than its factorization.

20680298 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10340151.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 20680298 is about 4547.5595653053. The cubic root of 20680298 is about 274.4851988750.

The spelling of 20680298 in words is "twenty million, six hundred eighty thousand, two hundred ninety-eight".