20964684 has 48 divisors (see below), whose sum is σ = 54980352. Its totient is φ = 6169152.

The previous prime is 20964677. The next prime is 20964701. The reversal of 20964684 is 48646902.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 667 + ... + 6509.

It is an arithmetic number, because the mean of its divisors is an integer number (1145424).

Almost surely, 2^20964684 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20964684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27490176).

20964684 is an abundant number, since it is smaller than the sum of its proper divisors (34015668).

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

20964684 is a wasteful number, since it uses less digits than its factorization.

20964684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5886 (or 5884 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 20964684 is about 4578.7207820526. The cubic root of 20964684 is about 275.7376734538.

The spelling of 20964684 in words is "twenty million, nine hundred sixty-four thousand, six hundred eighty-four".