20743928 has 32 divisors (see below), whose sum is σ = 40176000. Its totient is φ = 10036320.

The previous prime is 20743901. The next prime is 20743949. The reversal of 20743928 is 82934702.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 33203 + ... + 33821.

It is an arithmetic number, because the mean of its divisors is an integer number (1255500).

Almost surely, 2^20743928 is an apocalyptic number.

It is an amenable number.

20743928 is a deficient number, since it is larger than the sum of its proper divisors (19432072).

20743928 is a wasteful number, since it uses less digits than its factorization.

20743928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755 (or 751 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 20743928 is about 4554.5502522203. The cubic root of 20743928 is about 274.7664264619.

The spelling of 20743928 in words is "twenty million, seven hundred forty-three thousand, nine hundred twenty-eight".