18812429 has 8 divisors (see below), whose sum is σ = 19052280. Its totient is φ = 18574336.

The previous prime is 18812411. The next prime is 18812441. The reversal of 18812429 is 92421881.

It can be written as a sum of positive squares in 4 ways, for example, as 1155625 + 17656804 = 1075^2 + 4202^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18812429 - 2¹² = 18808333 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 (18812449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48167 + ... + 48555.

It is an arithmetic number, because the mean of its divisors is an integer number (2381535).

Almost surely, 2^18812429 is an apocalyptic number.

It is an amenable number.

18812429 is a deficient number, since it is larger than the sum of its proper divisors (239851).

18812429 is a wasteful number, since it uses less digits than its factorization.

18812429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879.

The product of its digits is 9216, while the sum is 35.

The square root of 18812429 is about 4337.3297084727. The cubic root of 18812429 is about 265.9591632714.

The spelling of 18812429 in words is "eighteen million, eight hundred twelve thousand, four hundred twenty-nine".