18855230592121 has 27 divisors (see below), whose sum is σ = 24109299696783. Its totient is φ = 14692126938720.

The previous prime is 18855230592073. The next prime is 18855230592131. The reversal of 18855230592121 is 12129503255881.

The square root of 18855230592121 is 4342261.

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., 6651834183225 + 12203396408896 = 2579115^2 + 3493336^2 .

It is not a de Polignac number, because 18855230592121 - 2⁹ = 18855230591609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18855230592131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 334325901 + ... + 334382293.

Almost surely, 2^{18855230592121} is an apocalyptic number.

18855230592121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

18855230592121 is the 4342261-st square number.

18855230592121 is the 2171131-st centered octagonal number.

It is an amenable number.

18855230592121 is a deficient number, since it is larger than the sum of its proper divisors (5254069104662).

18855230592121 is an frugal number, since it uses more digits than its factorization.

18855230592121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112822 (or 56411 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 52.

The spelling of 18855230592121 in words is "eighteen trillion, eight hundred fifty-five billion, two hundred thirty million, five hundred ninety-two thousand, one hundred twenty-one".