19473427 has 2 divisors, whose sum is σ = 19473428. Its totient is φ = 19473426.

The previous prime is 19473409. The next prime is 19473431. The reversal of 19473427 is 72437491.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19473427 is a prime.

It is not a weakly prime, because it can be changed into another prime (19473437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9736713 + 9736714.

It is an arithmetic number, because the mean of its divisors is an integer number (9736714).

Almost surely, 2^19473427 is an apocalyptic number.

19473427 is a deficient number, since it is larger than the sum of its proper divisors (1).

19473427 is an equidigital number, since it uses as much as digits as its factorization.

19473427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42336, while the sum is 37.

The square root of 19473427 is about 4412.8706076657. The cubic root of 19473427 is about 269.0383116847.

It can be divided in two parts, 19473 and 427, that added together give a triangular number (19900 = T₁₉₉).

The spelling of 19473427 in words is "nineteen million, four hundred seventy-three thousand, four hundred twenty-seven".