18039503752 has 8 divisors (see below), whose sum is σ = 33824069550. Its totient is φ = 9019751872.

The previous prime is 18039503719. The next prime is 18039503861. The reversal of 18039503752 is 25730593081.

It can be written as a sum of positive squares in only one way, i.e., 15409249956 + 2630253796 = 124134^2 + 51286^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 18039503699 and 18039503708.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1127468977 + ... + 1127468992.

Almost surely, 2^18039503752 is an apocalyptic number.

It is an amenable number.

18039503752 is a deficient number, since it is larger than the sum of its proper divisors (15784565798).

18039503752 is a wasteful number, since it uses less digits than its factorization.

18039503752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2254937975 (or 2254937971 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 43.

The spelling of 18039503752 in words is "eighteen billion, thirty-nine million, five hundred three thousand, seven hundred fifty-two".