19419218 has 16 divisors (see below), whose sum is σ = 35851200. Its totient is φ = 7682256.

The previous prime is 19419217. The next prime is 19419221. The reversal of 19419218 is 81291491.

It is not an unprimeable number, because it can be changed into a prime (19419217) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53168 + ... + 53531.

It is an arithmetic number, because the mean of its divisors is an integer number (2240700).

Almost surely, 2^19419218 is an apocalyptic number.

19419218 is a deficient number, since it is larger than the sum of its proper divisors (16431982).

19419218 is a wasteful number, since it uses less digits than its factorization.

19419218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106721.

The product of its digits is 5184, while the sum is 35.

The square root of 19419218 is about 4406.7241801592. The cubic root of 19419218 is about 268.7884352457.

The spelling of 19419218 in words is "nineteen million, four hundred nineteen thousand, two hundred eighteen".