18424844377 has 4 divisors (see below), whose sum is σ = 18565492176. Its totient is φ = 18284196580.

The previous prime is 18424844371. The next prime is 18424844381. The reversal of 18424844377 is 77344842481.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18424844377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18424844371) 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, 70323703 + ... + 70323964.

It is an arithmetic number, because the mean of its divisors is an integer number (4641373044).

Almost surely, 2^18424844377 is an apocalyptic number.

It is an amenable number.

18424844377 is a deficient number, since it is larger than the sum of its proper divisors (140647799).

18424844377 is a wasteful number, since it uses less digits than its factorization.

18424844377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140647798.

The product of its digits is 4816896, while the sum is 52.

The spelling of 18424844377 in words is "eighteen billion, four hundred twenty-four million, eight hundred forty-four thousand, three hundred seventy-seven".