18429074 has 4 divisors (see below), whose sum is σ = 27643614. Its totient is φ = 9214536.

The previous prime is 18429067. The next prime is 18429079. The reversal of 18429074 is 47092481.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47092481 = 89 ⋅529129.

It can be written as a sum of positive squares in only one way, i.e., 13741849 + 4687225 = 3707^2 + 2165^2 .

It is not an unprimeable number, because it can be changed into a prime (18429079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4607267 + ... + 4607270.

Almost surely, 2^18429074 is an apocalyptic number.

18429074 is a deficient number, since it is larger than the sum of its proper divisors (9214540).

18429074 is an equidigital number, since it uses as much as digits as its factorization.

18429074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9214539.

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

The square root of 18429074 is about 4292.9097358319. The cubic root of 18429074 is about 264.1402013953.

The spelling of 18429074 in words is "eighteen million, four hundred twenty-nine thousand, seventy-four".