19734813 has 16 divisors (see below), whose sum is σ = 33413760. Its totient is φ = 11276928.

The previous prime is 19734811. The next prime is 19734833. The reversal of 19734813 is 31843791.

It is a happy number.

It is not a de Polignac number, because 19734813 - 2¹ = 19734811 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19734811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52020 + ... + 52397.

It is an arithmetic number, because the mean of its divisors is an integer number (2088360).

Almost surely, 2^19734813 is an apocalyptic number.

It is an amenable number.

19734813 is a deficient number, since it is larger than the sum of its proper divisors (13678947).

19734813 is a wasteful number, since it uses less digits than its factorization.

19734813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104433 (or 104427 counting only the distinct ones).

The product of its digits is 18144, while the sum is 36.

The square root of 19734813 is about 4442.3882090605. The cubic root of 19734813 is about 270.2367060021.

It can be divided in two parts, 1973 and 4813, that added together give a triangular number (6786 = T₁₁₆).

The spelling of 19734813 in words is "nineteen million, seven hundred thirty-four thousand, eight hundred thirteen".