18429749 has 8 divisors (see below), whose sum is σ = 19912032. Its totient is φ = 16956720.

The previous prime is 18429731. The next prime is 18429767. The reversal of 18429749 is 94792481.

It is an interprime number because it is at equal distance from previous prime (18429731) and next prime (18429767).

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 18429749 - 2⁸ = 18429493 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18429769) 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 7 ways as a sum of consecutive naturals, for example, 2162 + ... + 6444.

It is an arithmetic number, because the mean of its divisors is an integer number (2489004).

Almost surely, 2^18429749 is an apocalyptic number.

It is an amenable number.

18429749 is a deficient number, since it is larger than the sum of its proper divisors (1482283).

18429749 is a wasteful number, since it uses less digits than its factorization.

18429749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4627.

The product of its digits is 145152, while the sum is 44.

The square root of 18429749 is about 4292.9883531172. The cubic root of 18429749 is about 264.1434262356.

The spelling of 18429749 in words is "eighteen million, four hundred twenty-nine thousand, seven hundred forty-nine".