19442471 has 2 divisors, whose sum is σ = 19442472. Its totient is φ = 19442470.

The previous prime is 19442461. The next prime is 19442473. The reversal of 19442471 is 17424491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 19442471 - 2¹⁰ = 19441447 is a prime.

It is a super-3 number, since 3×19442471³ (a number of 23 digits) contains 333 as substring.

Together with 19442473, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (19442473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9721235 + 9721236.

It is an arithmetic number, because the mean of its divisors is an integer number (9721236).

Almost surely, 2^19442471 is an apocalyptic number.

19442471 is a deficient number, since it is larger than the sum of its proper divisors (1).

19442471 is an equidigital number, since it uses as much as digits as its factorization.

19442471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 32.

The square root of 19442471 is about 4409.3617451962. The cubic root of 19442471 is about 268.8956768531.

The spelling of 19442471 in words is "nineteen million, four hundred forty-two thousand, four hundred seventy-one".