18809926328650 has 12 divisors (see below), whose sum is σ = 34986462971382. Its totient is φ = 7523970531440.

The previous prime is 18809926328647. The next prime is 18809926328651. The reversal of 18809926328650 is 5682362990881.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 10811397748761 + 7998528579889 = 3288069^2 + 2828167^2 .

It is not an unprimeable number, because it can be changed into a prime (18809926328651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 188099263237 + ... + 188099263336.

Almost surely, 2^{18809926328650} is an apocalyptic number.

18809926328650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18809926328650 is a deficient number, since it is larger than the sum of its proper divisors (16176536642732).

18809926328650 is a wasteful number, since it uses less digits than its factorization.

18809926328650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376198526585 (or 376198526580 counting only the distinct ones).

The product of its (nonzero) digits is 89579520, while the sum is 67.

The spelling of 18809926328650 in words is "eighteen trillion, eight hundred nine billion, nine hundred twenty-six million, three hundred twenty-eight thousand, six hundred fifty".