19455458694 has 64 divisors (see below), whose sum is σ = 46050647040. Its totient is φ = 5361471360.

The previous prime is 19455458677. The next prime is 19455458717. The reversal of 19455458694 is 49685455491.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1248012 + ... + 1263504.

It is an arithmetic number, because the mean of its divisors is an integer number (719541360).

Almost surely, 2^19455458694 is an apocalyptic number.

19455458694 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 19455458694, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23025323520).

19455458694 is an abundant number, since it is smaller than the sum of its proper divisors (26595188346).

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

19455458694 is a wasteful number, since it uses less digits than its factorization.

19455458694 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16565.

The product of its digits is 31104000, while the sum is 60.

The spelling of 19455458694 in words is "nineteen billion, four hundred fifty-five million, four hundred fifty-eight thousand, six hundred ninety-four".