19428371 has 2 divisors, whose sum is σ = 19428372. Its totient is φ = 19428370.

The previous prime is 19428361. The next prime is 19428373. The reversal of 19428371 is 17382491.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19428371 is a prime.

It is a super-3 number, since 3×19428371³ (a number of 23 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 19428373, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (19428373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9714185 + 9714186.

It is an arithmetic number, because the mean of its divisors is an integer number (9714186).

Almost surely, 2^19428371 is an apocalyptic number.

19428371 is a deficient number, since it is larger than the sum of its proper divisors (1).

19428371 is an equidigital number, since it uses as much as digits as its factorization.

19428371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 35.

The square root of 19428371 is about 4407.7625843505. The cubic root of 19428371 is about 268.8306586095.

The spelling of 19428371 in words is "nineteen million, four hundred twenty-eight thousand, three hundred seventy-one".