19493550131 has 4 divisors (see below), whose sum is σ = 21265691064. Its totient is φ = 17721409200.

The previous prime is 19493550091. The next prime is 19493550151. The reversal of 19493550131 is 13105539491.

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

It is not a de Polignac number, because 19493550131 - 2²⁶ = 19426441267 is a prime.

It is a super-2 number, since 2×19493550131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19493550151) 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 3 ways as a sum of consecutive naturals, for example, 886070450 + ... + 886070471.

It is an arithmetic number, because the mean of its divisors is an integer number (5316422766).

Almost surely, 2^19493550131 is an apocalyptic number.

19493550131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

19493550131 is a deficient number, since it is larger than the sum of its proper divisors (1772140933).

19493550131 is a wasteful number, since it uses less digits than its factorization.

19493550131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1772140932.

The product of its (nonzero) digits is 72900, while the sum is 41.

The spelling of 19493550131 in words is "nineteen billion, four hundred ninety-three million, five hundred fifty thousand, one hundred thirty-one".