18128907 has 16 divisors (see below), whose sum is σ = 28272000. Its totient is φ = 11449512.

The previous prime is 18128897. The next prime is 18128911. The reversal of 18128907 is 70982181.

It is not a de Polignac number, because 18128907 - 2¹⁰ = 18127883 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18128917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17157 + ... + 18182.

It is an arithmetic number, because the mean of its divisors is an integer number (1767000).

Almost surely, 2^18128907 is an apocalyptic number.

18128907 is a deficient number, since it is larger than the sum of its proper divisors (10143093).

18128907 is a wasteful number, since it uses less digits than its factorization.

18128907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35367 (or 35361 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 18128907 is about 4257.8054206363. The cubic root of 18128907 is about 262.6982665379.

The spelling of 18128907 in words is "eighteen million, one hundred twenty-eight thousand, nine hundred seven".