18014731 has 4 divisors (see below), whose sum is σ = 20588272. Its totient is φ = 15441192.

The previous prime is 18014729. The next prime is 18014741. The reversal of 18014731 is 13741081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13741081 = 1667 ⋅8243.

It is a cyclic number.

It is not a de Polignac number, because 18014731 - 2¹ = 18014729 is a prime.

It is a super-2 number, since 2×18014731² = 649061066004722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18014696 and 18014705.

It is not an unprimeable number, because it can be changed into a prime (18014701) 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, 1286760 + ... + 1286773.

It is an arithmetic number, because the mean of its divisors is an integer number (5147068).

Almost surely, 2^18014731 is an apocalyptic number.

18014731 is a deficient number, since it is larger than the sum of its proper divisors (2573541).

18014731 is an equidigital number, since it uses as much as digits as its factorization.

18014731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2573540.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 18014731 is about 4244.3763970694. The cubic root of 18014731 is about 262.1456127814.

The spelling of 18014731 in words is "eighteen million, fourteen thousand, seven hundred thirty-one".