20747104 has 48 divisors (see below), whose sum is σ = 48722688. Its totient is φ = 8502912.

The previous prime is 20747087. The next prime is 20747131. The reversal of 20747104 is 40174702.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3139 + ... + 7165.

It is an arithmetic number, because the mean of its divisors is an integer number (1015056).

Almost surely, 2^20747104 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 20747104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24361344).

20747104 is an abundant number, since it is smaller than the sum of its proper divisors (27975584).

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

20747104 is a wasteful number, since it uses less digits than its factorization.

20747104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4067 (or 4059 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 20747104 is about 4554.8989011832. The cubic root of 20747104 is about 274.7804484549.

The spelling of 20747104 in words is "twenty million, seven hundred forty-seven thousand, one hundred four".