19142220 has 24 divisors (see below), whose sum is σ = 53598384. Its totient is φ = 5104576.

The previous prime is 19142219. The next prime is 19142237. The reversal of 19142220 is 2224191.

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, 159459 + ... + 159578.

It is an arithmetic number, because the mean of its divisors is an integer number (2233266).

Almost surely, 2^19142220 is an apocalyptic number.

19142220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19142220 is an abundant number, since it is smaller than the sum of its proper divisors (34456164).

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

19142220 is a wasteful number, since it uses less digits than its factorization.

19142220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319049 (or 319047 counting only the distinct ones).

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

The square root of 19142220 is about 4375.1822819169. The cubic root of 19142220 is about 267.5043001609.

The spelling of 19142220 in words is "nineteen million, one hundred forty-two thousand, two hundred twenty".