19434918 has 16 divisors (see below), whose sum is σ = 39227760. Its totient is φ = 6418656.

The previous prime is 19434913. The next prime is 19434949. The reversal of 19434918 is 81943491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19434913) 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 7 ways as a sum of consecutive naturals, for example, 14205 + ... + 15512.

It is an arithmetic number, because the mean of its divisors is an integer number (2451735).

Almost surely, 2^19434918 is an apocalyptic number.

19434918 is an abundant number, since it is smaller than the sum of its proper divisors (19792842).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19434918 is a wasteful number, since it uses less digits than its factorization.

19434918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29831.

The product of its digits is 31104, while the sum is 39.

The square root of 19434918 is about 4408.5051888367. The cubic root of 19434918 is about 268.8608521970.

The spelling of 19434918 in words is "nineteen million, four hundred thirty-four thousand, nine hundred eighteen".