19742734 has 16 divisors (see below), whose sum is σ = 32606640. Its totient is φ = 8890560.

The previous prime is 19742699. The next prime is 19742741. The reversal of 19742734 is 43724791.

It is a junction number, because it is equal to n+sod(n) for n = 19742693 and 19742702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1719 + ... + 6514.

It is an arithmetic number, because the mean of its divisors is an integer number (2037915).

Almost surely, 2^19742734 is an apocalyptic number.

19742734 is a deficient number, since it is larger than the sum of its proper divisors (12863906).

19742734 is a wasteful number, since it uses less digits than its factorization.

19742734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8355.

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

The square root of 19742734 is about 4443.2796445869. The cubic root of 19742734 is about 270.2728563088.

The spelling of 19742734 in words is "nineteen million, seven hundred forty-two thousand, seven hundred thirty-four".