19709434 has 4 divisors (see below), whose sum is σ = 29564154. Its totient is φ = 9854716.

The previous prime is 19709423. The next prime is 19709449. The reversal of 19709434 is 43490791.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 10989225 + 8720209 = 3315^2 + 2953^2 .

It is a junction number, because it is equal to n+sod(n) for n = 19709393 and 19709402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4927357 + ... + 4927360.

Almost surely, 2^19709434 is an apocalyptic number.

19709434 is a deficient number, since it is larger than the sum of its proper divisors (9854720).

19709434 is an equidigital number, since it uses as much as digits as its factorization.

19709434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9854719.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 19709434 is about 4439.5308310676. The cubic root of 19709434 is about 270.1208147020.

The spelling of 19709434 in words is "nineteen million, seven hundred nine thousand, four hundred thirty-four".