18123743 has 12 divisors (see below), whose sum is σ = 20131944. Its totient is φ = 16302000.

The previous prime is 18123737. The next prime is 18123761. The reversal of 18123743 is 34732181.

It is not a de Polignac number, because 18123743 - 2¹⁶ = 18058207 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18123713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11480 + ... + 12962.

It is an arithmetic number, because the mean of its divisors is an integer number (1677662).

Almost surely, 2^18123743 is an apocalyptic number.

18123743 is a deficient number, since it is larger than the sum of its proper divisors (2008201).

18123743 is a wasteful number, since it uses less digits than its factorization.

18123743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1606 (or 1595 counting only the distinct ones).

The product of its digits is 4032, while the sum is 29.

The square root of 18123743 is about 4257.1989617588. The cubic root of 18123743 is about 262.6733210613.

It can be divided in two parts, 1812 and 3743, that added together give a palindrome (5555).

The spelling of 18123743 in words is "eighteen million, one hundred twenty-three thousand, seven hundred forty-three".