20047744 has 16 divisors (see below), whose sum is σ = 39939120. Its totient is φ = 10023808.

The previous prime is 20047739. The next prime is 20047757. The reversal of 20047744 is 44774002.

It is a tau number, because it is divible by the number of its divisors (16).

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 as a sum of consecutive naturals, namely, 78184 + ... + 78439.

It is an arithmetic number, because the mean of its divisors is an integer number (2496195).

Almost surely, 2^20047744 is an apocalyptic number.

It is an amenable number.

20047744 is a deficient number, since it is larger than the sum of its proper divisors (19891376).

20047744 is an equidigital number, since it uses as much as digits as its factorization.

20047744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156637 (or 156625 counting only the distinct ones).

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

The square root of 20047744 is about 4477.4707145888. The cubic root of 20047744 is about 271.6575852703.

The spelling of 20047744 in words is "twenty million, forty-seven thousand, seven hundred forty-four".