18893456847 has 8 divisors (see below), whose sum is σ = 27990306480. Its totient is φ = 12595637880.

The previous prime is 18893456843. The next prime is 18893456849. The reversal of 18893456847 is 74865439881.

18893456847 is a `hidden beast` number, since 18 + 8 + 93 + 456 + 84 + 7 = 666.

It is not a de Polignac number, because 18893456847 - 2² = 18893456843 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18893456843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349878804 + ... + 349878857.

It is an arithmetic number, because the mean of its divisors is an integer number (3498788310).

Almost surely, 2^18893456847 is an apocalyptic number.

18893456847 is a deficient number, since it is larger than the sum of its proper divisors (9096849633).

18893456847 is an equidigital number, since it uses as much as digits as its factorization.

18893456847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699757670 (or 699757664 counting only the distinct ones).

The product of its digits is 46448640, while the sum is 63.

The spelling of 18893456847 in words is "eighteen billion, eight hundred ninety-three million, four hundred fifty-six thousand, eight hundred forty-seven".