18074477 has 4 divisors (see below), whose sum is σ = 18088416. Its totient is φ = 18060540.

The previous prime is 18074467. The next prime is 18074501. The reversal of 18074477 is 77447081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 77447081 = 29 ⋅2670589.

It is a cyclic number.

It is not a de Polignac number, because 18074477 - 2²⁰ = 17025901 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18074477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18074437) 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, 4799 + ... + 7692.

It is an arithmetic number, because the mean of its divisors is an integer number (4522104).

Almost surely, 2^18074477 is an apocalyptic number.

It is an amenable number.

18074477 is a deficient number, since it is larger than the sum of its proper divisors (13939).

18074477 is a wasteful number, since it uses less digits than its factorization.

18074477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13938.

The product of its (nonzero) digits is 43904, while the sum is 38.

The square root of 18074477 is about 4251.4088253190. The cubic root of 18074477 is about 262.4350956692.

The spelling of 18074477 in words is "eighteen million, seventy-four thousand, four hundred seventy-seven".