19885027636744 has 16 divisors (see below), whose sum is σ = 37429502413500. Its totient is φ = 9903826993152.

The previous prime is 19885027636739. The next prime is 19885027636861. The reversal of 19885027636744 is 44763672058891.

It can be written as a sum of positive squares in 2 ways, for example, as 17189067240900 + 2695960395844 = 4145970^2 + 1641938^2 .

It is a super-2 number, since 2×19885027636744² (a number of 27 digits) contains 22 as substring.

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, 4835850969 + ... + 4835855080.

It is a 1-persistent number, because it is pandigital, but 2⋅19885027636744 = 39770055273488 is not.

Almost surely, 2^{19885027636744} is an apocalyptic number.

It is an amenable number.

19885027636744 is a deficient number, since it is larger than the sum of its proper divisors (17544474776756).

19885027636744 is a wasteful number, since it uses less digits than its factorization.

19885027636744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9671706312 (or 9671706308 counting only the distinct ones).

The product of its (nonzero) digits is 487710720, while the sum is 70.

The spelling of 19885027636744 in words is "nineteen trillion, eight hundred eighty-five billion, twenty-seven million, six hundred thirty-six thousand, seven hundred forty-four".