18461700479 has 4 divisors (see below), whose sum is σ = 18543029784. Its totient is φ = 18380371176.

The previous prime is 18461700451. The next prime is 18461700497. The reversal of 18461700479 is 97400716481.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 18461700479 - 2⁸ = 18461700223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18461700419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40664312 + ... + 40664765.

It is an arithmetic number, because the mean of its divisors is an integer number (4635757446).

Almost surely, 2^18461700479 is an apocalyptic number.

18461700479 is a deficient number, since it is larger than the sum of its proper divisors (81329305).

18461700479 is an equidigital number, since it uses as much as digits as its factorization.

18461700479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81329304.

The product of its (nonzero) digits is 338688, while the sum is 47.

The spelling of 18461700479 in words is "eighteen billion, four hundred sixty-one million, seven hundred thousand, four hundred seventy-nine".