19734427 has 2 divisors, whose sum is σ = 19734428. Its totient is φ = 19734426.

The previous prime is 19734409. The next prime is 19734457. The reversal of 19734427 is 72443791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19734427 - 2¹⁵ = 19701659 is a prime.

It is a plaindrome in base 14.

It is not a weakly prime, because it can be changed into another prime (19734457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9867213 + 9867214.

It is an arithmetic number, because the mean of its divisors is an integer number (9867214).

Almost surely, 2^19734427 is an apocalyptic number.

19734427 is a deficient number, since it is larger than the sum of its proper divisors (1).

19734427 is an equidigital number, since it uses as much as digits as its factorization.

19734427 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 19734427 is about 4442.3447637481. The cubic root of 19734427 is about 270.2349441063.

It can be divided in two parts, 1973 and 4427, that added together give a square (6400 = 80²).

The spelling of 19734427 in words is "nineteen million, seven hundred thirty-four thousand, four hundred twenty-seven".