20830566 has 16 divisors (see below), whose sum is σ = 41893488. Its totient is φ = 6904800.

The previous prime is 20830549. The next prime is 20830573. The reversal of 20830566 is 66503802.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8505 + ... + 10676.

It is an arithmetic number, because the mean of its divisors is an integer number (2618343).

Almost surely, 2^20830566 is an apocalyptic number.

20830566 is an abundant number, since it is smaller than the sum of its proper divisors (21062922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20830566 is a wasteful number, since it uses less digits than its factorization.

20830566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19367.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 20830566 is about 4564.0514896307. The cubic root of 20830566 is about 275.1484201573.

The spelling of 20830566 in words is "twenty million, eight hundred thirty thousand, five hundred sixty-six".