18699243 has 8 divisors (see below), whose sum is σ = 24953808. Its totient is φ = 12455424.

The previous prime is 18699223. The next prime is 18699257. The reversal of 18699243 is 34299681.

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

It is not a de Polignac number, because 18699243 - 2¹⁶ = 18633707 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18699195 and 18699204.

It is not an unprimeable number, because it can be changed into a prime (18699203) 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, 3255 + ... + 6927.

It is an arithmetic number, because the mean of its divisors is an integer number (3119226).

Almost surely, 2^18699243 is an apocalyptic number.

18699243 is a deficient number, since it is larger than the sum of its proper divisors (6254565).

18699243 is a wasteful number, since it uses less digits than its factorization.

18699243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5373.

The product of its digits is 93312, while the sum is 42.

The square root of 18699243 is about 4324.2621335900. The cubic root of 18699243 is about 265.4247040533.

The spelling of 18699243 in words is "eighteen million, six hundred ninety-nine thousand, two hundred forty-three".