19667873568849 has 32 divisors (see below), whose sum is σ = 29659604029440. Its totient is φ = 11485036612800.

The previous prime is 19667873568829. The next prime is 19667873568859. The reversal of 19667873568849 is 94886537876691.

It is not a de Polignac number, because 19667873568849 - 2⁵ = 19667873568817 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19667873568809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 41743207 + ... + 42211740.

It is an arithmetic number, because the mean of its divisors is an integer number (926862625920).

Almost surely, 2^{19667873568849} is an apocalyptic number.

It is an amenable number.

19667873568849 is a deficient number, since it is larger than the sum of its proper divisors (9991730460591).

19667873568849 is a wasteful number, since it uses less digits than its factorization.

19667873568849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83955221.

The product of its digits is 26336378880, while the sum is 87.

The spelling of 19667873568849 in words is "nineteen trillion, six hundred sixty-seven billion, eight hundred seventy-three million, five hundred sixty-eight thousand, eight hundred forty-nine".