18074429 has 4 divisors (see below), whose sum is σ = 18088476. Its totient is φ = 18060384.

The previous prime is 18074411. The next prime is 18074437. The reversal of 18074429 is 92447081.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92447081 = 2731 ⋅33851.

It can be written as a sum of positive squares in 2 ways, for example, as 11546404 + 6528025 = 3398^2 + 2555^2 .

It is a cyclic number.

It is not a de Polignac number, because 18074429 - 2¹² = 18070333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18074029) 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, 4874 + ... + 7739.

It is an arithmetic number, because the mean of its divisors is an integer number (4522119).

Almost surely, 2^18074429 is an apocalyptic number.

It is an amenable number.

18074429 is a deficient number, since it is larger than the sum of its proper divisors (14047).

18074429 is a wasteful number, since it uses less digits than its factorization.

18074429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14046.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 18074429 is about 4251.4031801277. The cubic root of 18074429 is about 262.4348633546.

The spelling of 18074429 in words is "eighteen million, seventy-four thousand, four hundred twenty-nine".