20802602 has 4 divisors (see below), whose sum is σ = 31203906. Its totient is φ = 10401300.

The previous prime is 20802569. The next prime is 20802631. The reversal of 20802602 is 20620802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20620802 = 2 ⋅10310401.

It can be written as a sum of positive squares in only one way, i.e., 10569001 + 10233601 = 3251^2 + 3199^2 .

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, 5200649 + ... + 5200652.

Almost surely, 2^20802602 is an apocalyptic number.

20802602 is a deficient number, since it is larger than the sum of its proper divisors (10401304).

20802602 is a wasteful number, since it uses less digits than its factorization.

20802602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10401303.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 20802602 is about 4560.9869545966. The cubic root of 20802602 is about 275.0252406584.

The spelling of 20802602 in words is "twenty million, eight hundred two thousand, six hundred two".