19580381231 has 4 divisors (see below), whose sum is σ = 20212006464. Its totient is φ = 18948756000.

The previous prime is 19580381213. The next prime is 19580381251. The reversal of 19580381231 is 13218308591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-19580381231 is a prime.

It is a super-2 number, since 2×19580381231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19580381251) 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 3 ways as a sum of consecutive naturals, for example, 315812570 + ... + 315812631.

It is an arithmetic number, because the mean of its divisors is an integer number (5053001616).

Almost surely, 2^19580381231 is an apocalyptic number.

19580381231 is a deficient number, since it is larger than the sum of its proper divisors (631625233).

19580381231 is an equidigital number, since it uses as much as digits as its factorization.

19580381231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631625232.

The product of its (nonzero) digits is 51840, while the sum is 41.

The spelling of 19580381231 in words is "nineteen billion, five hundred eighty million, three hundred eighty-one thousand, two hundred thirty-one".