18064971 has 32 divisors (see below), whose sum is σ = 28016640. Its totient is φ = 11491200.

The previous prime is 18064903. The next prime is 18064973. The reversal of 18064971 is 17946081.

18064971 is a `hidden beast` number, since 1 + 8 + 0 + 649 + 7 + 1 = 666.

It is not a de Polignac number, because 18064971 - 2¹¹ = 18062923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18064973) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94486 + ... + 94676.

It is an arithmetic number, because the mean of its divisors is an integer number (875520).

Almost surely, 2^18064971 is an apocalyptic number.

18064971 is a deficient number, since it is larger than the sum of its proper divisors (9951669).

18064971 is a wasteful number, since it uses less digits than its factorization.

18064971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 18064971 is about 4250.2906959407. The cubic root of 18064971 is about 262.3890796674.

The spelling of 18064971 in words is "eighteen million, sixty-four thousand, nine hundred seventy-one".