18901071 has 12 divisors (see below), whose sum is σ = 31201872. Its totient is φ = 10800576.

The previous prime is 18901061. The next prime is 18901079. The reversal of 18901071 is 17010981.

It is not a de Polignac number, because 18901071 - 2⁷ = 18900943 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18901079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 149946 + ... + 150071.

It is an arithmetic number, because the mean of its divisors is an integer number (2600156).

Almost surely, 2^18901071 is an apocalyptic number.

18901071 is a deficient number, since it is larger than the sum of its proper divisors (12300801).

18901071 is a wasteful number, since it uses less digits than its factorization.

18901071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300030 (or 300027 counting only the distinct ones).

The product of its (nonzero) digits is 504, while the sum is 27.

The square root of 18901071 is about 4347.5361988142. The cubic root of 18901071 is about 266.3762318838.

The spelling of 18901071 in words is "eighteen million, nine hundred one thousand, seventy-one".