19005223212 has 24 divisors (see below), whose sum is σ = 49272801200. Its totient is φ = 6335074368.

The previous prime is 19005223147. The next prime is 19005223243. The reversal of 19005223212 is 21232250091.

It is a happy number.

It is a super-2 number, since 2×19005223212² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87987037 + ... + 87987252.

Almost surely, 2^19005223212 is an apocalyptic number.

19005223212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

19005223212 is an abundant number, since it is smaller than the sum of its proper divisors (30267577988).

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

19005223212 is a wasteful number, since it uses less digits than its factorization.

19005223212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175974302 (or 175974294 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 19005223212 in words is "nineteen billion, five million, two hundred twenty-three thousand, two hundred twelve".