18476149329 has 45 divisors (see below), whose sum is σ = 30359492779. Its totient is φ = 11189510640.

The previous prime is 18476149291. The next prime is 18476149333. The reversal of 18476149329 is 92394167481.

The square root of 18476149329 is 135927.

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

18476149329 is a `hidden beast` number, since 1 + 8 + 476 + 149 + 3 + 29 = 666.

It can be written as a sum of positive squares in only one way, i.e., 18261468225 + 214681104 = 135135^2 + 14652^2 .

It is not a de Polignac number, because 18476149329 - 2¹⁷ = 18476018257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18476149129) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 13456087 + ... + 13457459.

Almost surely, 2^18476149329 is an apocalyptic number.

18476149329 is the 135927-th square number.

18476149329 is the 67964-th centered octagonal number.

It is an amenable number.

18476149329 is a deficient number, since it is larger than the sum of its proper divisors (11883343450).

18476149329 is an frugal number, since it uses more digits than its factorization.

18476149329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2780 (or 1387 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The spelling of 18476149329 in words is "eighteen billion, four hundred seventy-six million, one hundred forty-nine thousand, three hundred twenty-nine".