20944784 has 40 divisors (see below), whose sum is σ = 47467200. Its totient is φ = 8765568.

The previous prime is 20944771. The next prime is 20944793. The reversal of 20944784 is 48744902.

20944784 = T₂₆₇ + T₂₆₈ + ... + T₅₂₄.

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, 2642 + ... + 6990.

It is an arithmetic number, because the mean of its divisors is an integer number (1186680).

Almost surely, 2^20944784 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 20944784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23733600).

20944784 is an abundant number, since it is smaller than the sum of its proper divisors (26522416).

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

20944784 is a wasteful number, since it uses less digits than its factorization.

20944784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4407 (or 4401 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 20944784 is about 4576.5471700836. The cubic root of 20944784 is about 275.6504010232.

The spelling of 20944784 in words is "twenty million, nine hundred forty-four thousand, seven hundred eighty-four".