20830867 has 4 divisors (see below), whose sum is σ = 21025656. Its totient is φ = 20636080.

The previous prime is 20830861. The next prime is 20830879. The reversal of 20830867 is 76803802.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20830867 - 2²³ = 12442259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20830861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 97234 + ... + 97447.

It is an arithmetic number, because the mean of its divisors is an integer number (5256414).

Almost surely, 2^20830867 is an apocalyptic number.

20830867 is a deficient number, since it is larger than the sum of its proper divisors (194789).

20830867 is a wasteful number, since it uses less digits than its factorization.

20830867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194788.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 20830867 is about 4564.0844645997. The cubic root of 20830867 is about 275.1497454417.

The spelling of 20830867 in words is "twenty million, eight hundred thirty thousand, eight hundred sixty-seven".