20743724390 has 32 divisors (see below), whose sum is σ = 37540510560. Its totient is φ = 8252697600.

The previous prime is 20743724387. The next prime is 20743724401. The reversal of 20743724390 is 9342734702.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5021846 + ... + 5025974.

It is an arithmetic number, because the mean of its divisors is an integer number (1173140955).

Almost surely, 2^20743724390 is an apocalyptic number.

20743724390 is a deficient number, since it is larger than the sum of its proper divisors (16796786170).

20743724390 is a wasteful number, since it uses less digits than its factorization.

20743724390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6728.

The product of its (nonzero) digits is 254016, while the sum is 41.

The spelling of 20743724390 in words is "twenty billion, seven hundred forty-three million, seven hundred twenty-four thousand, three hundred ninety".