20834864 has 10 divisors (see below), whose sum is σ = 40367580. Its totient is φ = 10417424.

The previous prime is 20834861. The next prime is 20834873. The reversal of 20834864 is 46843802.

It is not an unprimeable number, because it can be changed into a prime (20834861) by changing a digit.

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 as a sum of consecutive naturals, namely, 651074 + ... + 651105.

It is an arithmetic number, because the mean of its divisors is an integer number (4036758).

Almost surely, 2^20834864 is an apocalyptic number.

It is an amenable number.

20834864 is a deficient number, since it is larger than the sum of its proper divisors (19532716).

20834864 is a wasteful number, since it uses less digits than its factorization.

20834864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302187 (or 1302181 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 35.

The square root of 20834864 is about 4564.5223189289. The cubic root of 20834864 is about 275.1673427762.

The spelling of 20834864 in words is "twenty million, eight hundred thirty-four thousand, eight hundred sixty-four".