18046844929 has 4 divisors (see below), whose sum is σ = 18049409284. Its totient is φ = 18044280576.

The previous prime is 18046844903. The next prime is 18046844939. The reversal of 18046844929 is 92944864081.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16987212225 + 1059632704 = 130335^2 + 32552^2 .

It is a cyclic number.

It is not a de Polignac number, because 18046844929 - 2³¹ = 15899361281 is a prime.

It is a super-2 number, since 2×18046844929² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18046844929.

It is not an unprimeable number, because it can be changed into a prime (18046844939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271592 + ... + 1285705.

It is an arithmetic number, because the mean of its divisors is an integer number (4512352321).

Almost surely, 2^18046844929 is an apocalyptic number.

It is an amenable number.

18046844929 is a deficient number, since it is larger than the sum of its proper divisors (2564355).

18046844929 is an equidigital number, since it uses as much as digits as its factorization.

18046844929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2564354.

The product of its (nonzero) digits is 3981312, while the sum is 55.

The spelling of 18046844929 in words is "eighteen billion, forty-six million, eight hundred forty-four thousand, nine hundred twenty-nine".