19722238 has 8 divisors (see below), whose sum is σ = 30000240. Its totient is φ = 9722160.

The previous prime is 19722217. The next prime is 19722259. The reversal of 19722238 is 83222791.

It is an interprime number because it is at equal distance from previous prime (19722217) and next prime (19722259).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69303 + ... + 69586.

It is an arithmetic number, because the mean of its divisors is an integer number (3750030).

Almost surely, 2^19722238 is an apocalyptic number.

19722238 is a deficient number, since it is larger than the sum of its proper divisors (10278002).

19722238 is a wasteful number, since it uses less digits than its factorization.

19722238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138962.

The product of its digits is 12096, while the sum is 34.

The square root of 19722238 is about 4440.9726412127. The cubic root of 19722238 is about 270.1792956343.

The spelling of 19722238 in words is "nineteen million, seven hundred twenty-two thousand, two hundred thirty-eight".