18434850625 has 15 divisors (see below), whose sum is σ = 23040431733. Its totient is φ = 14745165000.

The previous prime is 18434850613. The next prime is 18434850653. The reversal of 18434850625 is 52605843481.

The square root of 18434850625 is 135775.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1445292289 + 16989558336 = 38017^2 + 130344^2 .

It is not a de Polignac number, because 18434850625 - 2¹⁷ = 18434719553 is a prime.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3391660 + ... + 3397090.

Almost surely, 2^18434850625 is an apocalyptic number.

18434850625 is the 135775-th square number.

18434850625 is the 67888-th centered octagonal number.

It is an amenable number.

18434850625 is a deficient number, since it is larger than the sum of its proper divisors (4605581108).

18434850625 is an frugal number, since it uses more digits than its factorization.

18434850625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10882 (or 5436 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 46.

The spelling of 18434850625 in words is "eighteen billion, four hundred thirty-four million, eight hundred fifty thousand, six hundred twenty-five".