20830402 has 8 divisors (see below), whose sum is σ = 31758012. Its totient is φ = 10244400.

The previous prime is 20830399. The next prime is 20830417. The reversal of 20830402 is 20403802.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 14969161 + 5861241 = 3869^2 + 2421^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 20830402.

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 in 3 ways as a sum of consecutive naturals, for example, 85249 + ... + 85492.

Almost surely, 2^20830402 is an apocalyptic number.

20830402 is a deficient number, since it is larger than the sum of its proper divisors (10927610).

20830402 is a wasteful number, since it uses less digits than its factorization.

20830402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170804.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 20830402 is about 4564.0335231021. The cubic root of 20830402 is about 275.1476980700.

The spelling of 20830402 in words is "twenty million, eight hundred thirty thousand, four hundred two".