18220456467 has 20 divisors (see below), whose sum is σ = 28650752680. Its totient is φ = 11507655744.

The previous prime is 18220456439. The next prime is 18220456483. The reversal of 18220456467 is 76465402281.

18220456467 is a `hidden beast` number, since 1 + 8 + 2 + 20 + 4 + 564 + 67 = 666.

It is not a de Polignac number, because 18220456467 - 2⁶ = 18220456403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18220456967) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5918038 + ... + 5921115.

It is an arithmetic number, because the mean of its divisors is an integer number (1432537634).

Almost surely, 2^18220456467 is an apocalyptic number.

18220456467 is a deficient number, since it is larger than the sum of its proper divisors (10430296213).

18220456467 is a wasteful number, since it uses less digits than its factorization.

18220456467 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11839184 (or 11839175 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 18220456467 in words is "eighteen billion, two hundred twenty million, four hundred fifty-six thousand, four hundred sixty-seven".