18526897081 has 8 divisors (see below), whose sum is σ = 23098469184. Its totient is φ = 14436543120.

The previous prime is 18526897079. The next prime is 18526897159. The reversal of 18526897081 is 18079862581.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18526897081 - 2¹ = 18526897079 is a prime.

It is a super-2 number, since 2×18526897081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (18526897481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120304450 + ... + 120304603.

It is an arithmetic number, because the mean of its divisors is an integer number (2887308648).

Almost surely, 2^18526897081 is an apocalyptic number.

18526897081 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18526897081 is a deficient number, since it is larger than the sum of its proper divisors (4571572103).

18526897081 is a wasteful number, since it uses less digits than its factorization.

18526897081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240609071.

The product of its (nonzero) digits is 1935360, while the sum is 55.

The spelling of 18526897081 in words is "eighteen billion, five hundred twenty-six million, eight hundred ninety-seven thousand, eighty-one".