19454897065 has 8 divisors (see below), whose sum is σ = 23364165960. Its totient is φ = 15551724672.

The previous prime is 19454897057. The next prime is 19454897113. The reversal of 19454897065 is 56079845491.

It can be written as a sum of positive squares in 4 ways, for example, as 284833129 + 19170063936 = 16877^2 + 138456^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19454897065 - 2³ = 19454897057 is a prime.

It is a super-2 number, since 2×19454897065² (a number of 21 digits) contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 1517100 + ... + 1529869.

It is an arithmetic number, because the mean of its divisors is an integer number (2920520745).

Almost surely, 2^19454897065 is an apocalyptic number.

It is an amenable number.

19454897065 is a deficient number, since it is larger than the sum of its proper divisors (3909268895).

19454897065 is a wasteful number, since it uses less digits than its factorization.

19454897065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3048251.

The product of its (nonzero) digits is 10886400, while the sum is 58.

The spelling of 19454897065 in words is "nineteen billion, four hundred fifty-four million, eight hundred ninety-seven thousand, sixty-five".