19966148943 has 32 divisors (see below), whose sum is σ = 28979123712. Its totient is φ = 12154320000.

The previous prime is 19966148921. The next prime is 19966148953. The reversal of 19966148943 is 34984166991.

It is not a de Polignac number, because 19966148943 - 2⁸ = 19966148687 is a prime.

It is a super-2 number, since 2×19966148943² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19966148953) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7825518 + ... + 7828068.

It is an arithmetic number, because the mean of its divisors is an integer number (905597616).

Almost surely, 2^19966148943 is an apocalyptic number.

19966148943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

19966148943 is a deficient number, since it is larger than the sum of its proper divisors (9012974769).

19966148943 is a wasteful number, since it uses less digits than its factorization.

19966148943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4655.

The product of its digits is 10077696, while the sum is 60.

The spelling of 19966148943 in words is "nineteen billion, nine hundred sixty-six million, one hundred forty-eight thousand, nine hundred forty-three".