18107739225 has 27 divisors (see below), whose sum is σ = 32436588639. Its totient is φ = 9656384400.

The previous prime is 18107739217. The next prime is 18107739241. The reversal of 18107739225 is 52293770181.

The square root of 18107739225 is 134565.

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., 6518786121 + 11588953104 = 80739^2 + 107652^2 .

It is not a de Polignac number, because 18107739225 - 2³ = 18107739217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2013990 + ... + 2022960.

Almost surely, 2^18107739225 is an apocalyptic number.

18107739225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

18107739225 is the 134565-th square number.

18107739225 is the 67283-rd centered octagonal number.

It is an amenable number.

18107739225 is a deficient number, since it is larger than the sum of its proper divisors (14328849414).

18107739225 is an frugal number, since it uses more digits than its factorization.

18107739225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17958 (or 8979 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The spelling of 18107739225 in words is "eighteen billion, one hundred seven million, seven hundred thirty-nine thousand, two hundred twenty-five".