18586959556 has 27 divisors (see below), whose sum is σ = 35758785517. Its totient is φ = 8447254640.

The previous prime is 18586959541. The next prime is 18586959581. The reversal of 18586959556 is 65595968581.

The square root of 18586959556 is 136334.

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

It can be written as a sum of positive squares in only one way, i.e., 7305120900 + 11281838656 = 85470^2 + 106216^2 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18586959491 and 18586959500.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2996250 + ... + 3002446.

Almost surely, 2^18586959556 is an apocalyptic number.

18586959556 is the 136334-th square number.

It is an amenable number.

18586959556 is a deficient number, since it is larger than the sum of its proper divisors (17171825961).

18586959556 is an frugal number, since it uses more digits than its factorization.

18586959556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12420 (or 6210 counting only the distinct ones).

The product of its digits is 116640000, while the sum is 67.

The spelling of 18586959556 in words is "eighteen billion, five hundred eighty-six million, nine hundred fifty-nine thousand, five hundred fifty-six".