18421048077 has 4 divisors (see below), whose sum is σ = 24561397440. Its totient is φ = 12280698716.

The previous prime is 18421048073. The next prime is 18421048097. The reversal of 18421048077 is 77084012481.

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 not a de Polignac number, because 18421048077 - 2² = 18421048073 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18421048073) 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, 3070174677 + ... + 3070174682.

It is an arithmetic number, because the mean of its divisors is an integer number (6140349360).

Almost surely, 2^18421048077 is an apocalyptic number.

It is an amenable number.

18421048077 is a deficient number, since it is larger than the sum of its proper divisors (6140349363).

18421048077 is an equidigital number, since it uses as much as digits as its factorization.

18421048077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6140349362.

The product of its (nonzero) digits is 100352, while the sum is 42.

The spelling of 18421048077 in words is "eighteen billion, four hundred twenty-one million, forty-eight thousand, seventy-seven".