18121075 has 12 divisors (see below), whose sum is σ = 25680400. Its totient is φ = 12425760.

The previous prime is 18121073. The next prime is 18121093. The reversal of 18121075 is 57012181.

It is not a de Polignac number, because 18121075 - 2¹ = 18121073 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (18121073) 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, 51600 + ... + 51949.

Almost surely, 2^18121075 is an apocalyptic number.

18121075 is a deficient number, since it is larger than the sum of its proper divisors (7559325).

18121075 is a wasteful number, since it uses less digits than its factorization.

18121075 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103566 (or 103561 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 25.

The square root of 18121075 is about 4256.8855986507. The cubic root of 18121075 is about 262.6604310306.

The spelling of 18121075 in words is "eighteen million, one hundred twenty-one thousand, seventy-five".