18807096991225 has 9 divisors (see below), whose sum is σ = 23320827156783. Its totient is φ = 15045660246120.

The previous prime is 18807096991183. The next prime is 18807096991229. The reversal of 18807096991225 is 52219969070881.

The square root of 18807096991225 is 4336715.

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., 6770554916841 + 12036542074384 = 2602029^2 + 3469372^2 .

It is not a de Polignac number, because 18807096991225 - 2⁷ = 18807096991097 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18807096991229) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 21249904 + ... + 22117246.

Almost surely, 2^{18807096991225} is an apocalyptic number.

18807096991225 is the 4336715-th square number.

18807096991225 is the 2168358-th centered octagonal number.

It is an amenable number.

18807096991225 is a deficient number, since it is larger than the sum of its proper divisors (4513730165558).

18807096991225 is an frugal number, since it uses more digits than its factorization.

18807096991225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1734696 (or 867348 counting only the distinct ones).

The product of its (nonzero) digits is 39191040, while the sum is 67.

The spelling of 18807096991225 in words is "eighteen trillion, eight hundred seven billion, ninety-six million, nine hundred ninety-one thousand, two hundred twenty-five".