19457232081 has 12 divisors (see below), whose sum is σ = 30178564272. Its totient is φ = 11118418248.

The previous prime is 19457232049. The next prime is 19457232101. The reversal of 19457232081 is 18023275491.

It is not a de Polignac number, because 19457232081 - 2⁵ = 19457232049 is a prime.

It is a super-2 number, since 2×19457232081² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19457236081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 66180915 + ... + 66181208.

It is an arithmetic number, because the mean of its divisors is an integer number (2514880356).

Almost surely, 2^19457232081 is an apocalyptic number.

It is an amenable number.

19457232081 is a deficient number, since it is larger than the sum of its proper divisors (10721332191).

19457232081 is a wasteful number, since it uses less digits than its factorization.

19457232081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132362140 (or 132362133 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The spelling of 19457232081 in words is "nineteen billion, four hundred fifty-seven million, two hundred thirty-two thousand, eighty-one".