19986903655492 has 24 divisors (see below), whose sum is σ = 35952468336792. Its totient is φ = 9716433619200.

The previous prime is 19986903655463. The next prime is 19986903655501. The reversal of 19986903655492 is 29455630968991.

It can be written as a sum of positive squares in 4 ways, for example, as 7903104072516 + 12083799582976 = 2811246^2 + 3476176^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 207923559 + ... + 208019662.

It is an arithmetic number, because the mean of its divisors is an integer number (1498019514033).

Almost surely, 2^{19986903655492} is an apocalyptic number.

It is an amenable number.

19986903655492 is a deficient number, since it is larger than the sum of its proper divisors (15965564681300).

19986903655492 is a wasteful number, since it uses less digits than its factorization.

19986903655492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415943559 (or 415943557 counting only the distinct ones).

The product of its (nonzero) digits is 1133740800, while the sum is 76.

The spelling of 19986903655492 in words is "nineteen trillion, nine hundred eighty-six billion, nine hundred three million, six hundred fifty-five thousand, four hundred ninety-two".