20705444 has 12 divisors (see below), whose sum is σ = 36267504. Its totient is φ = 10343304.

The previous prime is 20705423. The next prime is 20705453. The reversal of 20705444 is 44450702.

It is a super-2 number, since 2×20705444² = 857430822474272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5507 + ... + 8469.

It is an arithmetic number, because the mean of its divisors is an integer number (3022292).

Almost surely, 2^20705444 is an apocalyptic number.

It is an amenable number.

20705444 is a deficient number, since it is larger than the sum of its proper divisors (15562060).

20705444 is a wasteful number, since it uses less digits than its factorization.

20705444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4714 (or 4712 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 26.

The square root of 20705444 is about 4550.3235049829. The cubic root of 20705444 is about 274.5964063174.

The spelling of 20705444 in words is "twenty million, seven hundred five thousand, four hundred forty-four".