18953868105 has 16 divisors (see below), whose sum is σ = 33695765760. Its totient is φ = 10108729584.

The previous prime is 18953868091. The next prime is 18953868113. The reversal of 18953868105 is 50186835981.

18953868105 is a `hidden beast` number, since 189 + 5 + 386 + 81 + 0 + 5 = 666.

It is not a de Polignac number, because 18953868105 - 2⁶ = 18953868041 is a prime.

It is a super-2 number, since 2×18953868105² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 70199377 + ... + 70199646.

It is an arithmetic number, because the mean of its divisors is an integer number (2105985360).

Almost surely, 2^18953868105 is an apocalyptic number.

18953868105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18953868105 is a deficient number, since it is larger than the sum of its proper divisors (14741897655).

18953868105 is a wasteful number, since it uses less digits than its factorization.

18953868105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140399037 (or 140399031 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 54.

The spelling of 18953868105 in words is "eighteen billion, nine hundred fifty-three million, eight hundred sixty-eight thousand, one hundred five".