20743724432 has 10 divisors (see below), whose sum is σ = 40190966118.
Its totient is φ = 10371862208.
The previous prime is 20743724401. The next prime is 20743724461. The reversal of 20743724432 is 23442734702.
It is a happy number.
It can be written as a sum of positive squares in only one way, i.e., 18240123136 + 2503601296 = 135056^2 + 50036^2
It is an unprimeable number.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648241373 + ... + 648241404.
Almost surely, 220743724432 is an apocalyptic number.
It is an amenable number.
20743724432 is a deficient number, since it is larger than the sum of its proper divisors (19447241686).
20743724432 is a wasteful number, since it uses less digits than its factorization.
20743724432 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1296482785 (or 1296482779 counting only the distinct ones).
The product of its (nonzero) digits is 225792, while the sum is 38.
The spelling of 20743724432 in words is "twenty billion, seven hundred forty-three million, seven hundred twenty-four thousand, four hundred thirty-two".