18434977 has 8 divisors (see below), whose sum is σ = 20142720. Its totient is φ = 16732560.

The previous prime is 18434957. The next prime is 18434989. The reversal of 18434977 is 77943481.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18434977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18434957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10623 + ... + 12235.

It is an arithmetic number, because the mean of its divisors is an integer number (2517840).

Almost surely, 2^18434977 is an apocalyptic number.

It is an amenable number.

18434977 is a deficient number, since it is larger than the sum of its proper divisors (1707743).

18434977 is a wasteful number, since it uses less digits than its factorization.

18434977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2663.

The product of its digits is 169344, while the sum is 43.

The square root of 18434977 is about 4293.5972097997. The cubic root of 18434977 is about 264.1684005543.

The spelling of 18434977 in words is "eighteen million, four hundred thirty-four thousand, nine hundred seventy-seven".