19806692850064 has 20 divisors (see below), whose sum is σ = 38376459469260. Its totient is φ = 9903090406400.

The previous prime is 19806692850013. The next prime is 19806692850097. The reversal of 19806692850064 is 46005829660891.

It can be written as a sum of positive squares in 2 ways, for example, as 1143359718400 + 18663333131664 = 1069280^2 + 4320108^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19806692849978 and 19806692850005.

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, 15362137 + ... + 16601464.

It is an arithmetic number, because the mean of its divisors is an integer number (1918822973463).

Almost surely, 2^{19806692850064} is an apocalyptic number.

It is an amenable number.

19806692850064 is a deficient number, since it is larger than the sum of its proper divisors (18569766619196).

19806692850064 is a wasteful number, since it uses less digits than its factorization.

19806692850064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32002338 (or 32002332 counting only the distinct ones).

The product of its (nonzero) digits is 44789760, while the sum is 64.

The spelling of 19806692850064 in words is "nineteen trillion, eight hundred six billion, six hundred ninety-two million, eight hundred fifty thousand, sixty-four".