18701149247 has 16 divisors (see below), whose sum is σ = 21518160000. Its totient is φ = 16073886240.

The previous prime is 18701149211. The next prime is 18701149261. The reversal of 18701149247 is 74294110781.

It is a cyclic number.

It is not a de Polignac number, because 18701149247 - 2³⁴ = 1521280063 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18701149198 and 18701149207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18701149147) 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 15 ways as a sum of consecutive naturals, for example, 14633 + ... + 193949.

It is an arithmetic number, because the mean of its divisors is an integer number (1344885000).

Almost surely, 2^18701149247 is an apocalyptic number.

18701149247 is a deficient number, since it is larger than the sum of its proper divisors (2817010753).

18701149247 is a wasteful number, since it uses less digits than its factorization.

18701149247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179846.

The product of its (nonzero) digits is 112896, while the sum is 44.

The spelling of 18701149247 in words is "eighteen billion, seven hundred one million, one hundred forty-nine thousand, two hundred forty-seven".