18871055461 has 8 divisors (see below), whose sum is σ = 19008171648. Its totient is φ = 18734436000.

The previous prime is 18871055453. The next prime is 18871055491. The reversal of 18871055461 is 16455017881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18871055461 - 2³ = 18871055453 is a prime.

It is a super-2 number, since 2×18871055461² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18871055431) 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, 47755 + ... + 200056.

It is an arithmetic number, because the mean of its divisors is an integer number (2376021456).

Almost surely, 2^18871055461 is an apocalyptic number.

It is an amenable number.

18871055461 is a deficient number, since it is larger than the sum of its proper divisors (137116187).

18871055461 is a wasteful number, since it uses less digits than its factorization.

18871055461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248363.

The product of its (nonzero) digits is 268800, while the sum is 46.

The spelling of 18871055461 in words is "eighteen billion, eight hundred seventy-one million, fifty-five thousand, four hundred sixty-one".