18677952347 has 4 divisors (see below), whose sum is σ = 18719551800. Its totient is φ = 18636352896.

The previous prime is 18677952289. The next prime is 18677952389. The reversal of 18677952347 is 74325977681.

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 18677952347 - 2⁶ = 18677952283 is a prime.

It is a super-4 number, since 4×18677952347⁴ (a number of 42 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18677952047) 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, 20799053 + ... + 20799950.

It is an arithmetic number, because the mean of its divisors is an integer number (4679887950).

Almost surely, 2^18677952347 is an apocalyptic number.

18677952347 is a deficient number, since it is larger than the sum of its proper divisors (41599453).

18677952347 is an equidigital number, since it uses as much as digits as its factorization.

18677952347 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41599452.

The product of its digits is 17781120, while the sum is 59.

The spelling of 18677952347 in words is "eighteen billion, six hundred seventy-seven million, nine hundred fifty-two thousand, three hundred forty-seven".