18411977 has 8 divisors (see below), whose sum is σ = 19152000. Its totient is φ = 17684784.

The previous prime is 18411961. The next prime is 18411979. The reversal of 18411977 is 77911481.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18411977 - 2⁴ = 18411961 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 18411977.

It is not an unprimeable number, because it can be changed into a prime (18411979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 227 + ... + 6072.

It is an arithmetic number, because the mean of its divisors is an integer number (2394000).

Almost surely, 2^18411977 is an apocalyptic number.

It is an amenable number.

18411977 is a deficient number, since it is larger than the sum of its proper divisors (740023).

18411977 is an equidigital number, since it uses as much as digits as its factorization.

18411977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6415.

The product of its digits is 14112, while the sum is 38.

The square root of 18411977 is about 4290.9179670555. The cubic root of 18411977 is about 264.0584935050.

The spelling of 18411977 in words is "eighteen million, four hundred eleven thousand, nine hundred seventy-seven".