20730298 has 4 divisors (see below), whose sum is σ = 31095450. Its totient is φ = 10365148.

The previous prime is 20730277. The next prime is 20730313. The reversal of 20730298 is 89203702.

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., 18636489 + 2093809 = 4317^2 + 1447^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5182573 + ... + 5182576.

Almost surely, 2^20730298 is an apocalyptic number.

20730298 is a deficient number, since it is larger than the sum of its proper divisors (10365152).

20730298 is a wasteful number, since it uses less digits than its factorization.

20730298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10365151.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 20730298 is about 4553.0537005399. The cubic root of 20730298 is about 274.7062339575.

The spelling of 20730298 in words is "twenty million, seven hundred thirty thousand, two hundred ninety-eight".