18756462081 has 16 divisors (see below), whose sum is σ = 28588464000. Its totient is φ = 10715282688.

The previous prime is 18756462061. The next prime is 18756462089. The reversal of 18756462081 is 18026465781.

It is not a de Polignac number, because 18756462081 - 2⁷ = 18756461953 is a prime.

It is a super-2 number, since 2×18756462081² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 18756462081.

It is not an unprimeable number, because it can be changed into a prime (18756462089) 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 15 ways as a sum of consecutive naturals, for example, 25266 + ... + 195323.

It is an arithmetic number, because the mean of its divisors is an integer number (1786779000).

Almost surely, 2^18756462081 is an apocalyptic number.

It is an amenable number.

18756462081 is a deficient number, since it is larger than the sum of its proper divisors (9832001919).

18756462081 is a wasteful number, since it uses less digits than its factorization.

18756462081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224648.

The product of its (nonzero) digits is 645120, while the sum is 48.

The spelling of 18756462081 in words is "eighteen billion, seven hundred fifty-six million, four hundred sixty-two thousand, eighty-one".