20830286 has 8 divisors (see below), whose sum is σ = 31491840. Its totient is φ = 10333008.

The previous prime is 20830267. The next prime is 20830291. The reversal of 20830286 is 68203802.

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

It is a pancake number, because a pancake can be divided into 20830286 parts by 6454 straight cuts.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40751 + ... + 41258.

It is an arithmetic number, because the mean of its divisors is an integer number (3936480).

Almost surely, 2^20830286 is an apocalyptic number.

20830286 is a deficient number, since it is larger than the sum of its proper divisors (10661554).

20830286 is a wasteful number, since it uses less digits than its factorization.

20830286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82138.

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 20830286 is about 4564.0208150270. The cubic root of 20830286 is about 275.1471873231.

The spelling of 20830286 in words is "twenty million, eight hundred thirty thousand, two hundred eighty-six".