18944895936628 has 12 divisors (see below), whose sum is σ = 33291134562532. Its totient is φ = 9433143204480.

The previous prime is 18944895936503. The next prime is 18944895936761. The reversal of 18944895936628 is 82663959844981.

It can be written as a sum of positive squares in 2 ways, for example, as 15756628569444 + 3188267367184 = 3969462^2 + 1785572^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9826189875 + ... + 9826191802.

Almost surely, 2^{18944895936628} is an apocalyptic number.

It is an amenable number.

18944895936628 is a deficient number, since it is larger than the sum of its proper divisors (14346238625904).

18944895936628 is a wasteful number, since it uses less digits than its factorization.

18944895936628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19652381922 (or 19652381920 counting only the distinct ones).

The product of its digits is 6449725440, while the sum is 82.

The spelling of 18944895936628 in words is "eighteen trillion, nine hundred forty-four billion, eight hundred ninety-five million, nine hundred thirty-six thousand, six hundred twenty-eight".