20964844 has 12 divisors (see below), whose sum is σ = 36724968. Its totient is φ = 10472000.

The previous prime is 20964803. The next prime is 20964851. The reversal of 20964844 is 44846902.

20964844 is nontrivially palindromic in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3519 + ... + 7369.

It is an arithmetic number, because the mean of its divisors is an integer number (3060414).

Almost surely, 2^20964844 is an apocalyptic number.

It is an amenable number.

20964844 is a deficient number, since it is larger than the sum of its proper divisors (15760124).

20964844 is a wasteful number, since it uses less digits than its factorization.

20964844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5216 (or 5214 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 37.

The square root of 20964844 is about 4578.7382541482. The cubic root of 20964844 is about 275.7383749178.

The spelling of 20964844 in words is "twenty million, nine hundred sixty-four thousand, eight hundred forty-four".