18105751145 has 16 divisors (see below), whose sum is σ = 23010937488. Its totient is φ = 13629020160.

The previous prime is 18105751141. The next prime is 18105751151. The reversal of 18105751145 is 54115750181.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 1510441 + 18104240704 = 1229^2 + 134552^2 .

It is not a de Polignac number, because 18105751145 - 2² = 18105751141 is a prime.

It is a super-2 number, since 2×18105751145² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 18105751099 and 18105751108.

It is not an unprimeable number, because it can be changed into a prime (18105751141) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327725 + ... + 378965.

It is an arithmetic number, because the mean of its divisors is an integer number (1438183593).

Almost surely, 2^18105751145 is an apocalyptic number.

It is an amenable number.

18105751145 is a deficient number, since it is larger than the sum of its proper divisors (4905186343).

18105751145 is a wasteful number, since it uses less digits than its factorization.

18105751145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55420.

The product of its (nonzero) digits is 28000, while the sum is 38.

The spelling of 18105751145 in words is "eighteen billion, one hundred five million, seven hundred fifty-one thousand, one hundred forty-five".