18169452642 has 32 divisors (see below), whose sum is σ = 39649227840. Its totient is φ = 5504952320.

The previous prime is 18169452607. The next prime is 18169452643. The reversal of 18169452642 is 24625496181.

It is a junction number, because it is equal to n+sod(n) for n = 18169452591 and 18169452600.

It is not an unprimeable number, because it can be changed into a prime (18169452643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 430834 + ... + 471122.

It is an arithmetic number, because the mean of its divisors is an integer number (1239038370).

Almost surely, 2^18169452642 is an apocalyptic number.

18169452642 is an abundant number, since it is smaller than the sum of its proper divisors (21479775198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18169452642 is a wasteful number, since it uses less digits than its factorization.

18169452642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47138.

The product of its digits is 829440, while the sum is 48.

The spelling of 18169452642 in words is "eighteen billion, one hundred sixty-nine million, four hundred fifty-two thousand, six hundred forty-two".