19739315454 has 16 divisors (see below), whose sum is σ = 39480075648. Its totient is φ = 6579531032.

The previous prime is 19739315443. The next prime is 19739315459. The reversal of 19739315454 is 45451393791.

It is a happy number.

It is a super-2 number, since 2×19739315454² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 19739315397 and 19739315406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19739315459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212329 + ... + 290795.

It is an arithmetic number, because the mean of its divisors is an integer number (2467504728).

Almost surely, 2^19739315454 is an apocalyptic number.

19739315454 is an abundant number, since it is smaller than the sum of its proper divisors (19740760194).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19739315454 is a wasteful number, since it uses less digits than its factorization.

19739315454 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120399.

The product of its digits is 2041200, while the sum is 51.

The spelling of 19739315454 in words is "nineteen billion, seven hundred thirty-nine million, three hundred fifteen thousand, four hundred fifty-four".