18472043 has 4 divisors (see below), whose sum is σ = 19109040. Its totient is φ = 17835048.

The previous prime is 18472033. The next prime is 18472049. The reversal of 18472043 is 34027481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34027481 = 769 ⋅44249.

It is a cyclic number.

It is not a de Polignac number, because 18472043 - 2⁸ = 18471787 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 636967 = 18472043 / (1 + 8 + 4 + 7 + 2 + 0 + 4 + 3).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18471997 and 18472015.

It is not an unprimeable number, because it can be changed into a prime (18472049) 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, 318455 + ... + 318512.

It is an arithmetic number, because the mean of its divisors is an integer number (4777260).

Almost surely, 2^18472043 is an apocalyptic number.

18472043 is a deficient number, since it is larger than the sum of its proper divisors (636997).

18472043 is an equidigital number, since it uses as much as digits as its factorization.

18472043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636996.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 18472043 is about 4297.9114695396. The cubic root of 18472043 is about 264.3453307229.

It can be divided in two parts, 184 and 72043, that added together give a palindrome (72227).

The spelling of 18472043 in words is "eighteen million, four hundred seventy-two thousand, forty-three".