18443506294436 has 12 divisors (see below), whose sum is σ = 32277221463900. Its totient is φ = 9221443019040.

The previous prime is 18443506294403. The next prime is 18443506294463. The reversal of 18443506294436 is 63449260534481.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 16603669057600 + 1839837236836 = 4074760^2 + 1356406^2 .

It is a hoax number, since the sum of its digits (59) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 77398211 + ... + 77636138.

It is an arithmetic number, because the mean of its divisors is an integer number (2689768455325).

Almost surely, 2^{18443506294436} is an apocalyptic number.

It is an amenable number.

18443506294436 is a deficient number, since it is larger than the sum of its proper divisors (13833715169464).

18443506294436 is a wasteful number, since it uses less digits than its factorization.

18443506294436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155064094 (or 155064092 counting only the distinct ones).

The product of its (nonzero) digits is 59719680, while the sum is 59.

The spelling of 18443506294436 in words is "eighteen trillion, four hundred forty-three billion, five hundred six million, two hundred ninety-four thousand, four hundred thirty-six".