19922237 has 2 divisors, whose sum is σ = 19922238. Its totient is φ = 19922236.

The previous prime is 19922233. The next prime is 19922281. The reversal of 19922237 is 73222991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19545241 + 376996 = 4421^2 + 614^2 .

It is an emirp because it is prime and its reverse (73222991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 19922237 - 2² = 19922233 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 19922197 and 19922206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19922233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9961118 + 9961119.

It is an arithmetic number, because the mean of its divisors is an integer number (9961119).

Almost surely, 2^19922237 is an apocalyptic number.

It is an amenable number.

19922237 is a deficient number, since it is larger than the sum of its proper divisors (1).

19922237 is an equidigital number, since it uses as much as digits as its factorization.

19922237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 35.

The square root of 19922237 is about 4463.4333197663. The cubic root of 19922237 is about 271.0895026237.

The spelling of 19922237 in words is "nineteen million, nine hundred twenty-two thousand, two hundred thirty-seven".