19490172013 has 32 divisors (see below), whose sum is σ = 23078764800. Its totient is φ = 16295924736.

The previous prime is 19490172007. The next prime is 19490172061. The reversal of 19490172013 is 31027109491.

It is not a de Polignac number, because 19490172013 - 2⁹ = 19490171501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19490172113) 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 31 ways as a sum of consecutive naturals, for example, 724581 + ... + 750997.

It is an arithmetic number, because the mean of its divisors is an integer number (721211400).

Almost surely, 2^19490172013 is an apocalyptic number.

19490172013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19490172013 is a deficient number, since it is larger than the sum of its proper divisors (3588592787).

19490172013 is a wasteful number, since it uses less digits than its factorization.

19490172013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26581.

The product of its (nonzero) digits is 13608, while the sum is 37.

The spelling of 19490172013 in words is "nineteen billion, four hundred ninety million, one hundred seventy-two thousand, thirteen".