219420012 has 24 divisors (see below), whose sum is σ = 585120256. Its totient is φ = 62691408.

The previous prime is 219420011. The next prime is 219420029. The reversal of 219420012 is 210024912.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (219420011) 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, 1305988 + ... + 1306155.

Almost surely, 2^219420012 is an apocalyptic number.

It is an amenable number.

219420012 is an abundant number, since it is smaller than the sum of its proper divisors (365700244).

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

219420012 is a wasteful number, since it uses less digits than its factorization.

219420012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2612157 (or 2612155 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 219420012 is about 14812.8326798084. The cubic root of 219420012 is about 603.1501101772.

Adding to 219420012 its reverse (210024912), we get a palindrome (429444924).

The spelling of 219420012 in words is "two hundred nineteen million, four hundred twenty thousand, twelve".