18283671435481 has 3 divisors (see below), whose sum is σ = 18283675711423. Its totient is φ = 18283667159540.

The previous prime is 18283671435473. The next prime is 18283671435541. The reversal of 18283671435481 is 18453417638281.

The square root of 18283671435481 is 4275941.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 17049128225481 + 1234543210000 = 4129059^2 + 1111100^2 .

It is not a de Polignac number, because 18283671435481 - 2³ = 18283671435473 is a prime.

It is a super-2 number, since 2×18283671435481² (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 (18283671435431) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 2137971 + ... + 6413911.

Almost surely, 2^{18283671435481} is an apocalyptic number.

18283671435481 is the 4275941-st square number.

18283671435481 is the 2137971-st centered octagonal number.

It is an amenable number.

18283671435481 is a deficient number, since it is larger than the sum of its proper divisors (4275942).

18283671435481 is an frugal number, since it uses more digits than its factorization.

18283671435481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8551882 (or 4275941 counting only the distinct ones).

The product of its digits is 30965760, while the sum is 61.

The spelling of 18283671435481 in words is "eighteen trillion, two hundred eighty-three billion, six hundred seventy-one million, four hundred thirty-five thousand, four hundred eighty-one".