18466705961 has 4 divisors (see below), whose sum is σ = 20145497424. Its totient is φ = 16787914500.

The previous prime is 18466705937. The next prime is 18466705963. The reversal of 18466705961 is 16950766481.

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-18466705961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18466705963) 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, 839395715 + ... + 839395736.

It is an arithmetic number, because the mean of its divisors is an integer number (5036374356).

Almost surely, 2^18466705961 is an apocalyptic number.

18466705961 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18466705961 is a deficient number, since it is larger than the sum of its proper divisors (1678791463).

18466705961 is a wasteful number, since it uses less digits than its factorization.

18466705961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678791462.

The product of its (nonzero) digits is 2177280, while the sum is 53.

It can be divided in two parts, 18466 and 705961, that added together give a palindrome (724427).

The spelling of 18466705961 in words is "eighteen billion, four hundred sixty-six million, seven hundred five thousand, nine hundred sixty-one".