19713388 has 12 divisors (see below), whose sum is σ = 35688240. Its totient is φ = 9516752.

The previous prime is 19713377. The next prime is 19713389. The reversal of 19713388 is 88331791.

It is a self number, because there is not a number n which added to its sum of digits gives 19713388.

It is not an unprimeable number, because it can be changed into a prime (19713389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84856 + ... + 85087.

It is an arithmetic number, because the mean of its divisors is an integer number (2974020).

Almost surely, 2^19713388 is an apocalyptic number.

It is an amenable number.

19713388 is a deficient number, since it is larger than the sum of its proper divisors (15974852).

19713388 is a wasteful number, since it uses less digits than its factorization.

19713388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169976 (or 169974 counting only the distinct ones).

The product of its digits is 36288, while the sum is 40.

The square root of 19713388 is about 4439.9761260619. The cubic root of 19713388 is about 270.1388768862.

The spelling of 19713388 in words is "nineteen million, seven hundred thirteen thousand, three hundred eighty-eight".