18971005054250 has 32 divisors (see below), whose sum is σ = 35769215926080. Its totient is φ = 7533809187600.

The previous prime is 18971005054249. The next prime is 18971005054271. The reversal of 18971005054250 is 5245050017981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 18971005054195 and 18971005054204.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 272929352 + ... + 272998851.

It is an arithmetic number, because the mean of its divisors is an integer number (1117787997690).

Almost surely, 2^{18971005054250} is an apocalyptic number.

18971005054250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18971005054250 is a deficient number, since it is larger than the sum of its proper divisors (16798210871830).

18971005054250 is a wasteful number, since it uses less digits than its factorization.

18971005054250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545928359 (or 545928349 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 47.

The spelling of 18971005054250 in words is "eighteen trillion, nine hundred seventy-one billion, five million, fifty-four thousand, two hundred fifty".