19418812 has 12 divisors (see below), whose sum is σ = 38837680. Its totient is φ = 8322336.

The previous prime is 19418809. The next prime is 19418813. The reversal of 19418812 is 21881491.

19418812 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19418813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346737 + ... + 346792.

Almost surely, 2^19418812 is an apocalyptic number.

It is an amenable number.

19418812 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19418812 is a wasteful number, since it uses less digits than its factorization.

19418812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693540 (or 693538 counting only the distinct ones).

The product of its digits is 4608, while the sum is 34.

The square root of 19418812 is about 4406.6781139539. The cubic root of 19418812 is about 268.7865620349.

The spelling of 19418812 in words is "nineteen million, four hundred eighteen thousand, eight hundred twelve".