19418916 has 48 divisors (see below), whose sum is σ = 49851648. Its totient is φ = 5834400.

The previous prime is 19418909. The next prime is 19418921. The reversal of 19418916 is 61981491.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16731 + ... + 17853.

It is an arithmetic number, because the mean of its divisors is an integer number (1038576).

Almost surely, 2^19418916 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19418916, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24925824).

19418916 is an abundant number, since it is smaller than the sum of its proper divisors (30432732).

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

19418916 is a wasteful number, since it uses less digits than its factorization.

19418916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1270 counting only the distinct ones).

The product of its digits is 15552, while the sum is 39.

The square root of 19418916 is about 4406.6899142100. The cubic root of 19418916 is about 268.7870418746.

It can be divided in two parts, 194 and 18916, that added together give a triangular number (19110 = T₁₉₅).

The spelling of 19418916 in words is "nineteen million, four hundred eighteen thousand, nine hundred sixteen".