20820298 has 4 divisors (see below), whose sum is σ = 31230450. Its totient is φ = 10410148.

The previous prime is 20820259. The next prime is 20820311. The reversal of 20820298 is 89202802.

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., 18173169 + 2647129 = 4263^2 + 1627^2 .

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, 5205073 + ... + 5205076.

Almost surely, 2^20820298 is an apocalyptic number.

20820298 is a deficient number, since it is larger than the sum of its proper divisors (10410152).

20820298 is a wasteful number, since it uses less digits than its factorization.

20820298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10410151.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 20820298 is about 4562.9264732187. The cubic root of 20820298 is about 275.1032031379.

The spelling of 20820298 in words is "twenty million, eight hundred twenty thousand, two hundred ninety-eight".