18666861058153 has 24 divisors (see below), whose sum is σ = 23450606262720. Its totient is φ = 14544783343200.

The previous prime is 18666861058103. The next prime is 18666861058283. The reversal of 18666861058153 is 35185016866681.

It is not a de Polignac number, because 18666861058153 - 2²¹ = 18666858961001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18666861058103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14580063 + ... + 15808603.

It is an arithmetic number, because the mean of its divisors is an integer number (977108594280).

Almost surely, 2^{18666861058153} is an apocalyptic number.

It is an amenable number.

18666861058153 is a deficient number, since it is larger than the sum of its proper divisors (4783745204567).

18666861058153 is a wasteful number, since it uses less digits than its factorization.

18666861058153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1246509 (or 1246498 counting only the distinct ones).

The product of its (nonzero) digits is 49766400, while the sum is 64.

The spelling of 18666861058153 in words is "eighteen trillion, six hundred sixty-six billion, eight hundred sixty-one million, fifty-eight thousand, one hundred fifty-three".