18212007 has 16 divisors (see below), whose sum is σ = 26888832. Its totient is φ = 10871520.

The previous prime is 18211993. The next prime is 18212009. The reversal of 18212007 is 70021281.

It is not a de Polignac number, because 18212007 - 2¹⁴ = 18195623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18212009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1908 + ... + 6329.

It is an arithmetic number, because the mean of its divisors is an integer number (1680552).

Almost surely, 2^18212007 is an apocalyptic number.

18212007 is a deficient number, since it is larger than the sum of its proper divisors (8676825).

18212007 is a wasteful number, since it uses less digits than its factorization.

18212007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8318.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 18212007 is about 4267.5528116240. The cubic root of 18212007 is about 263.0990436911.

Adding to 18212007 its reverse (70021281), we get a palindrome (88233288).

It can be divided in two parts, 1821 and 2007, that added together give a triangular number (3828 = T₈₇).

The spelling of 18212007 in words is "eighteen million, two hundred twelve thousand, seven".