18438334463045 has 8 divisors (see below), whose sum is σ = 25286858692224. Its totient is φ = 12643429346064.

The previous prime is 18438334463041. The next prime is 18438334463051. The reversal of 18438334463045 is 54036443383481.

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 18438334463045 - 2² = 18438334463041 is a prime.

It is a super-2 number, since 2×18438334463045² (a number of 27 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 (18438334463041) 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, 263404778009 + ... + 263404778078.

It is an arithmetic number, because the mean of its divisors is an integer number (3160857336528).

Almost surely, 2^{18438334463045} is an apocalyptic number.

It is an amenable number.

18438334463045 is a deficient number, since it is larger than the sum of its proper divisors (6848524229179).

18438334463045 is an equidigital number, since it uses as much as digits as its factorization.

18438334463045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526809556099.

The product of its (nonzero) digits is 39813120, while the sum is 56.

The spelling of 18438334463045 in words is "eighteen trillion, four hundred thirty-eight billion, three hundred thirty-four million, four hundred sixty-three thousand, forty-five".