19220138 has 8 divisors (see below), whose sum is σ = 32948832. Its totient is φ = 8237196.

The previous prime is 19220129. The next prime is 19220161. The reversal of 19220138 is 83102291.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon 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, 686420 + ... + 686447.

It is an arithmetic number, because the mean of its divisors is an integer number (4118604).

Almost surely, 2^19220138 is an apocalyptic number.

19220138 is a deficient number, since it is larger than the sum of its proper divisors (13728694).

19220138 is a wasteful number, since it uses less digits than its factorization.

19220138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1372876.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 19220138 is about 4384.0777821567. The cubic root of 19220138 is about 267.8667656598.

The spelling of 19220138 in words is "nineteen million, two hundred twenty thousand, one hundred thirty-eight".