19012220 has 12 divisors (see below), whose sum is σ = 39925704. Its totient is φ = 7604880.

The previous prime is 19012199. The next prime is 19012241. The reversal of 19012220 is 2221091.

It is an interprime number because it is at equal distance from previous prime (19012199) and next prime (19012241).

It is a super-2 number, since 2×19012220² = 722929018656800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 475286 + ... + 475325.

It is an arithmetic number, because the mean of its divisors is an integer number (3327142).

Almost surely, 2^19012220 is an apocalyptic number.

19012220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19012220 is an abundant number, since it is smaller than the sum of its proper divisors (20913484).

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

19012220 is a wasteful number, since it uses less digits than its factorization.

19012220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950620 (or 950618 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 19012220 is about 4360.3004483636. The cubic root of 19012220 is about 266.8973593985.

The spelling of 19012220 in words is "nineteen million, twelve thousand, two hundred twenty".