19009727686490 has 32 divisors (see below), whose sum is σ = 34459984742400. Its totient is φ = 7550045769664.

The previous prime is 19009727686487. The next prime is 19009727686517. The reversal of 19009727686490 is 9468672790091.

It is a super-2 number, since 2×19009727686490² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19009727686490.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1629569 + ... + 6377691.

It is an arithmetic number, because the mean of its divisors is an integer number (1076874523200).

Almost surely, 2^{19009727686490} is an apocalyptic number.

19009727686490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19009727686490 is a deficient number, since it is larger than the sum of its proper divisors (15450257055910).

19009727686490 is a wasteful number, since it uses less digits than its factorization.

19009727686490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4750966.

The product of its (nonzero) digits is 82301184, while the sum is 68.

The spelling of 19009727686490 in words is "nineteen trillion, nine billion, seven hundred twenty-seven million, six hundred eighty-six thousand, four hundred ninety".