18429863 has 4 divisors (see below), whose sum is σ = 18536568. Its totient is φ = 18323160.

The previous prime is 18429857. The next prime is 18429883. The reversal of 18429863 is 36892481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36892481 = 1873 ⋅19697.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18429863 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18429863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18429883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53093 + ... + 53438.

It is an arithmetic number, because the mean of its divisors is an integer number (4634142).

Almost surely, 2^18429863 is an apocalyptic number.

18429863 is a deficient number, since it is larger than the sum of its proper divisors (106705).

18429863 is a wasteful number, since it uses less digits than its factorization.

18429863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106704.

The product of its digits is 82944, while the sum is 41.

The square root of 18429863 is about 4293.0016305611. The cubic root of 18429863 is about 264.1439708675.

The spelling of 18429863 in words is "eighteen million, four hundred twenty-nine thousand, eight hundred sixty-three".