18056103129 has 27 divisors (see below), whose sum is σ = 26675751583. Its totient is φ = 11768924832.

The previous prime is 18056103127. The next prime is 18056103133. The reversal of 18056103129 is 92130165081.

The square root of 18056103129 is 134373.

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

18056103129 is a `hidden beast` number, since 1 + 8 + 0 + 5 + 610 + 31 + 2 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7519491225 + 10536611904 = 86715^2 + 102648^2 .

It is not a de Polignac number, because 18056103129 - 2¹ = 18056103127 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 18056103093 and 18056103102.

It is not an unprimeable number, because it can be changed into a prime (18056103127) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 18946117 + ... + 18947069.

Almost surely, 2^18056103129 is an apocalyptic number.

18056103129 is the 134373-rd square number.

18056103129 is the 67187-th centered octagonal number.

It is an amenable number.

18056103129 is a deficient number, since it is larger than the sum of its proper divisors (8619648454).

18056103129 is an frugal number, since it uses more digits than its factorization.

18056103129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006 (or 1003 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

Multiplying 18056103129 by its sum of digits (36), we get a square (650019712644 = 806238²).

The spelling of 18056103129 in words is "eighteen billion, fifty-six million, one hundred three thousand, one hundred twenty-nine".