16219812 has 24 divisors (see below), whose sum is σ = 43253056. Its totient is φ = 4634208.

The previous prime is 16219811. The next prime is 16219813. The reversal of 16219812 is 21891261.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (16219811) and next prime (16219813).

It is a self number, because there is not a number n which added to its sum of digits gives 16219812.

It is not an unprimeable number, because it can be changed into a prime (16219811) 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, 96463 + ... + 96630.

Almost surely, 2^16219812 is an apocalyptic number.

16219812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16219812 is an abundant number, since it is smaller than the sum of its proper divisors (27033244).

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

16219812 is a wasteful number, since it uses less digits than its factorization.

16219812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193107 (or 193105 counting only the distinct ones).

The product of its digits is 1728, while the sum is 30.

The square root of 16219812 is about 4027.3827729681. The cubic root of 16219812 is about 253.1329062612.

The spelling of 16219812 in words is "sixteen million, two hundred nineteen thousand, eight hundred twelve".