18870225121 has 8 divisors (see below), whose sum is σ = 20605874688. Its totient is φ = 17137938000.

The previous prime is 18870225103. The next prime is 18870225167. The reversal of 18870225121 is 12152207881.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 18870225121 - 2¹⁷ = 18870094049 is a prime.

It is a super-2 number, since 2×18870225121² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18870228121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 828865 + ... + 851326.

It is an arithmetic number, because the mean of its divisors is an integer number (2575734336).

Almost surely, 2^18870225121 is an apocalyptic number.

18870225121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18870225121 is a deficient number, since it is larger than the sum of its proper divisors (1735649567).

18870225121 is a wasteful number, since it uses less digits than its factorization.

18870225121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1681223.

The product of its (nonzero) digits is 17920, while the sum is 37.

The spelling of 18870225121 in words is "eighteen billion, eight hundred seventy million, two hundred twenty-five thousand, one hundred twenty-one".