19713634450 has 48 divisors (see below), whose sum is σ = 37297282464. Its totient is φ = 7750512000.

The previous prime is 19713634387. The next prime is 19713634453. The reversal of 19713634450 is 5443631791.

It is a junction number, because it is equal to n+sod(n) for n = 19713634397 and 19713634406.

It is not an unprimeable number, because it can be changed into a prime (19713634453) 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 23 ways as a sum of consecutive naturals, for example, 1558150 + ... + 1570750.

It is an arithmetic number, because the mean of its divisors is an integer number (777026718).

Almost surely, 2^19713634450 is an apocalyptic number.

19713634450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19713634450 is a deficient number, since it is larger than the sum of its proper divisors (17583648014).

19713634450 is a wasteful number, since it uses less digits than its factorization.

19713634450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13147 (or 13142 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 43.

The spelling of 19713634450 in words is "nineteen billion, seven hundred thirteen million, six hundred thirty-four thousand, four hundred fifty".