20744704 has 40 divisors (see below), whose sum is σ = 42818688. Its totient is φ = 10030080.

The previous prime is 20744699. The next prime is 20744723. The reversal of 20744704 is 40744702.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15219 + ... + 16525.

Almost surely, 2^20744704 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 20744704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21409344).

20744704 is an abundant number, since it is smaller than the sum of its proper divisors (22073984).

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

20744704 is an equidigital number, since it uses as much as digits as its factorization.

20744704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356 (or 1340 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 20744704 is about 4554.6354409546. The cubic root of 20744704 is about 274.7698526226.

The spelling of 20744704 in words is "twenty million, seven hundred forty-four thousand, seven hundred four".