20702498 has 8 divisors (see below), whose sum is σ = 32880492. Its totient is φ = 9742336.

The previous prime is 20702497. The next prime is 20702519. The reversal of 20702498 is 89420702.

It can be written as a sum of positive squares in 2 ways, for example, as 20403289 + 299209 = 4517^2 + 547^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (20702497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 304415 + ... + 304482.

Almost surely, 2^20702498 is an apocalyptic number.

20702498 is a deficient number, since it is larger than the sum of its proper divisors (12177994).

20702498 is a wasteful number, since it uses less digits than its factorization.

20702498 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608916.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 20702498 is about 4549.9997802198. Note that the first 3 decimals coincide. The cubic root of 20702498 is about 274.5833823774.

The spelling of 20702498 in words is "twenty million, seven hundred two thousand, four hundred ninety-eight".