18857549388948 has 48 divisors (see below), whose sum is σ = 44943212504064. Its totient is φ = 6151276815840.

The previous prime is 18857549388871. The next prime is 18857549389039. The reversal of 18857549388948 is 84988394575881.

It is a happy number.

It is a super-2 number, since 2×18857549388948² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 1924011 + ... + 6435597.

It is an arithmetic number, because the mean of its divisors is an integer number (936316927168).

Almost surely, 2^{18857549388948} is an apocalyptic number.

It is an amenable number.

18857549388948 is an abundant number, since it is smaller than the sum of its proper divisors (26085663115116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18857549388948 is a wasteful number, since it uses less digits than its factorization.

18857549388948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4519052 (or 4519050 counting only the distinct ones).

The product of its digits is 22295347200, while the sum is 87.

The spelling of 18857549388948 in words is "eighteen trillion, eight hundred fifty-seven billion, five hundred forty-nine million, three hundred eighty-eight thousand, nine hundred forty-eight".