74506018 has 4 divisors (see below), whose sum is σ = 111759030. Its totient is φ = 37253008.

The previous prime is 74506013. The next prime is 74506021. The reversal of 74506018 is 81060547.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 38229489 + 36276529 = 6183^2 + 6023^2 .

It is a super-2 number, since 2×74506018² = 11102293436432648, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (74506013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18626503 + ... + 18626506.

Almost surely, 2^74506018 is an apocalyptic number.

74506018 is a deficient number, since it is larger than the sum of its proper divisors (37253012).

74506018 is a wasteful number, since it uses less digits than its factorization.

74506018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37253011.

The product of its (nonzero) digits is 6720, while the sum is 31.

The square root of 74506018 is about 8631.6868571560. The cubic root of 74506018 is about 420.7884245600.

The spelling of 74506018 in words is "seventy-four million, five hundred six thousand, eighteen".