18010957 has 4 divisors (see below), whose sum is σ = 18170460. Its totient is φ = 17851456.

The previous prime is 18010919. The next prime is 18010963. The reversal of 18010957 is 75901081.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7584516 + 10426441 = 2754^2 + 3229^2 .

It is a cyclic number.

It is not a de Polignac number, because 18010957 - 2⁷ = 18010829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18010997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79582 + ... + 79807.

It is an arithmetic number, because the mean of its divisors is an integer number (4542615).

Almost surely, 2^18010957 is an apocalyptic number.

It is an amenable number.

18010957 is a deficient number, since it is larger than the sum of its proper divisors (159503).

18010957 is a wasteful number, since it uses less digits than its factorization.

18010957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159502.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 18010957 is about 4243.9317855027. The cubic root of 18010957 is about 262.1273054188.

The spelling of 18010957 in words is "eighteen million, ten thousand, nine hundred fifty-seven".