19139734 has 4 divisors (see below), whose sum is σ = 28709604. Its totient is φ = 9569866.

The previous prime is 19139723. The next prime is 19139737. The reversal of 19139734 is 43793191.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43793191 = 13 ⋅3368707.

It is a junction number, because it is equal to n+sod(n) for n = 19139693 and 19139702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19139737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4784932 + ... + 4784935.

It is an arithmetic number, because the mean of its divisors is an integer number (7177401).

Almost surely, 2^19139734 is an apocalyptic number.

19139734 is a deficient number, since it is larger than the sum of its proper divisors (9569870).

19139734 is an equidigital number, since it uses as much as digits as its factorization.

19139734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9569869.

The product of its digits is 20412, while the sum is 37.

The square root of 19139734 is about 4374.8981702435. The cubic root of 19139734 is about 267.4927193989.

The spelling of 19139734 in words is "nineteen million, one hundred thirty-nine thousand, seven hundred thirty-four".