19454121 has 16 divisors (see below), whose sum is σ = 29171520. Its totient is φ = 12811680.

The previous prime is 19454117. The next prime is 19454153. The reversal of 19454121 is 12145491.

It is not a de Polignac number, because 19454121 - 2² = 19454117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (19454101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2100 + ... + 6581.

It is an arithmetic number, because the mean of its divisors is an integer number (1823220).

Almost surely, 2^19454121 is an apocalyptic number.

It is an amenable number.

19454121 is a deficient number, since it is larger than the sum of its proper divisors (9717399).

19454121 is an equidigital number, since it uses as much as digits as its factorization.

19454121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8773 (or 8767 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 19454121 is about 4410.6826002332. The cubic root of 19454121 is about 268.9493738883.

The spelling of 19454121 in words is "nineteen million, four hundred fifty-four thousand, one hundred twenty-one".