20830858 has 4 divisors (see below), whose sum is σ = 31246290. Its totient is φ = 10415428.

The previous prime is 20830841. The next prime is 20830861. The reversal of 20830858 is 85803802.

It is a happy number.

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., 17247409 + 3583449 = 4153^2 + 1893^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5207713 + ... + 5207716.

Almost surely, 2^20830858 is an apocalyptic number.

20830858 is a deficient number, since it is larger than the sum of its proper divisors (10415432).

20830858 is a wasteful number, since it uses less digits than its factorization.

20830858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10415431.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 20830858 is about 4564.0834786406. The cubic root of 20830858 is about 275.1497058155.

The spelling of 20830858 in words is "twenty million, eight hundred thirty thousand, eight hundred fifty-eight".