19301005810681 has 15 divisors (see below), whose sum is σ = 22516751460741. Its totient is φ = 16543534748076.

The previous prime is 19301005810637. The next prime is 19301005810693. The reversal of 19301005810681 is 18601850010391.

The square root of 19301005810681 is 4393291.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 19301005810681 - 2²⁵ = 19300972256249 is a prime.

It is a super-2 number, since 2×19301005810681² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19301005810631) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 215226430 + ... + 215316088.

Almost surely, 2^{19301005810681} is an apocalyptic number.

19301005810681 is the 4393291-st square number.

19301005810681 is the 2196646-th centered octagonal number.

It is an amenable number.

19301005810681 is a deficient number, since it is larger than the sum of its proper divisors (3215745650060).

19301005810681 is an frugal number, since it uses more digits than its factorization.

19301005810681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179346 (or 89666 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 43.

The spelling of 19301005810681 in words is "nineteen trillion, three hundred one billion, five million, eight hundred ten thousand, six hundred eighty-one".