18107562121 has 16 divisors (see below), whose sum is σ = 20923505280. Its totient is φ = 15487310080.

The previous prime is 18107562103. The next prime is 18107562149. The reversal of 18107562121 is 12126570181.

It is not a de Polignac number, because 18107562121 - 2¹³ = 18107553929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (18107562101) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 527340 + ... + 560626.

It is an arithmetic number, because the mean of its divisors is an integer number (1307719080).

Almost surely, 2^18107562121 is an apocalyptic number.

18107562121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

18107562121 is a deficient number, since it is larger than the sum of its proper divisors (2815943159).

18107562121 is a wasteful number, since it uses less digits than its factorization.

18107562121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36224.

The product of its (nonzero) digits is 6720, while the sum is 34.

The spelling of 18107562121 in words is "eighteen billion, one hundred seven million, five hundred sixty-two thousand, one hundred twenty-one".