18060605281 has 4 divisors (see below), whose sum is σ = 18062361792. Its totient is φ = 18058848772.

The previous prime is 18060605273. The next prime is 18060605293. The reversal of 18060605281 is 18250606081.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 18060605281 - 2³ = 18060605273 is a prime.

It is a super-2 number, since 2×18060605281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 18060605281.

It is not an unprimeable number, because it can be changed into a prime (18060605201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 862741 + ... + 883426.

It is an arithmetic number, because the mean of its divisors is an integer number (4515590448).

Almost surely, 2^18060605281 is an apocalyptic number.

It is an amenable number.

18060605281 is a deficient number, since it is larger than the sum of its proper divisors (1756511).

18060605281 is a wasteful number, since it uses less digits than its factorization.

18060605281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1756510.

The product of its (nonzero) digits is 23040, while the sum is 37.

The spelling of 18060605281 in words is "eighteen billion, sixty million, six hundred five thousand, two hundred eighty-one".