18734121 has 36 divisors (see below), whose sum is σ = 32864832. Its totient is φ = 10234224.

The previous prime is 18734113. The next prime is 18734123. The reversal of 18734121 is 12143781.

It is not a de Polignac number, because 18734121 - 2³ = 18734113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (18734123) 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 35 ways as a sum of consecutive naturals, for example, 9220 + ... + 11066.

It is an arithmetic number, because the mean of its divisors is an integer number (912912).

Almost surely, 2^18734121 is an apocalyptic number.

It is an amenable number.

18734121 is a deficient number, since it is larger than the sum of its proper divisors (14130711).

18734121 is a wasteful number, since it uses less digits than its factorization.

18734121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1890 (or 1880 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 18734121 is about 4328.2930815738. The cubic root of 18734121 is about 265.5896257576.

The spelling of 18734121 in words is "eighteen million, seven hundred thirty-four thousand, one hundred twenty-one".