18232106981 has 8 divisors (see below), whose sum is σ = 19910453184. Its totient is φ = 16557241120.

The previous prime is 18232106957. The next prime is 18232106989. The reversal of 18232106981 is 18960123281.

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 18232106981 - 2³⁰ = 17158365157 is a prime.

It is a super-2 number, since 2×18232106981² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18232106989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 859121 + ... + 880086.

It is an arithmetic number, because the mean of its divisors is an integer number (2488806648).

Almost surely, 2^18232106981 is an apocalyptic number.

18232106981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18232106981 is a deficient number, since it is larger than the sum of its proper divisors (1678346203).

18232106981 is a wasteful number, since it uses less digits than its factorization.

18232106981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740171.

The product of its (nonzero) digits is 41472, while the sum is 41.

The spelling of 18232106981 in words is "eighteen billion, two hundred thirty-two million, one hundred six thousand, nine hundred eighty-one".