18947958553972 has 12 divisors (see below), whose sum is σ = 37895917108000. Its totient is φ = 8120553665976.

The previous prime is 18947958553949. The next prime is 18947958554029. The reversal of 18947958553972 is 27935585974981.

18947958553972 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338356402722 + ... + 338356402777.

Almost surely, 2^{18947958553972} is an apocalyptic number.

It is an amenable number.

18947958553972 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18947958553972 is a wasteful number, since it uses less digits than its factorization.

18947958553972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 676712805510 (or 676712805508 counting only the distinct ones).

The product of its digits is 6858432000, while the sum is 82.

The spelling of 18947958553972 in words is "eighteen trillion, nine hundred forty-seven billion, nine hundred fifty-eight million, five hundred fifty-three thousand, nine hundred seventy-two".