18872007 has 36 divisors (see below), whose sum is σ = 32204088. Its totient is φ = 9794400.

The previous prime is 18872003. The next prime is 18872027. The reversal of 18872007 is 70027881.

It is not a de Polignac number, because 18872007 - 2² = 18872003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18872003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 17257 + ... + 18317.

It is an arithmetic number, because the mean of its divisors is an integer number (894558).

Almost surely, 2^18872007 is an apocalyptic number.

18872007 is a deficient number, since it is larger than the sum of its proper divisors (13332081).

18872007 is a wasteful number, since it uses less digits than its factorization.

18872007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1100 (or 1082 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 33.

The square root of 18872007 is about 4344.1923299965. The cubic root of 18872007 is about 266.2396270948.

Adding to 18872007 its reverse (70027881), we get a palindrome (88899888).

The spelling of 18872007 in words is "eighteen million, eight hundred seventy-two thousand, seven".