18405141852681 has 24 divisors (see below), whose sum is σ = 27358106016384. Its totient is φ = 11917356715680.

The previous prime is 18405141852679. The next prime is 18405141852689. The reversal of 18405141852681 is 18625814150481.

18405141852681 is a `hidden beast` number, since 1 + 8 + 4 + 0 + 514 + 18 + 52 + 68 + 1 = 666.

It is not a de Polignac number, because 18405141852681 - 2¹ = 18405141852679 is a prime.

It is a super-2 number, since 2×18405141852681² (a number of 27 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (18405141852689) 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, 166017006 + ... + 166127831.

It is an arithmetic number, because the mean of its divisors is an integer number (1139921084016).

Almost surely, 2^{18405141852681} is an apocalyptic number.

It is an amenable number.

18405141852681 is a deficient number, since it is larger than the sum of its proper divisors (8952964163703).

18405141852681 is a wasteful number, since it uses less digits than its factorization.

18405141852681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332145021 (or 332145018 counting only the distinct ones).

The product of its (nonzero) digits is 2457600, while the sum is 54.

The spelling of 18405141852681 in words is "eighteen trillion, four hundred five billion, one hundred forty-one million, eight hundred fifty-two thousand, six hundred eighty-one".