20964284 has 24 divisors (see below), whose sum is σ = 41002416. Its totient is φ = 9296000.

The previous prime is 20964283. The next prime is 20964287. The reversal of 20964284 is 48246902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20964283) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 4007 + ... + 7614.

It is an arithmetic number, because the mean of its divisors is an integer number (1708434).

Almost surely, 2^20964284 is an apocalyptic number.

It is an amenable number.

20964284 is a deficient number, since it is larger than the sum of its proper divisors (20038132).

20964284 is a wasteful number, since it uses less digits than its factorization.

20964284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11677 (or 11675 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 20964284 is about 4578.6771015218. The cubic root of 20964284 is about 275.7359197781.

The spelling of 20964284 in words is "twenty million, nine hundred sixty-four thousand, two hundred eighty-four".