19270431894 has 32 divisors (see below), whose sum is σ = 45121015296. Its totient is φ = 5371548480.

The previous prime is 19270431893. The next prime is 19270431899. The reversal of 19270431894 is 49813407291.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19270431893) 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 15 ways as a sum of consecutive naturals, for example, 5593642 + ... + 5597085.

It is an arithmetic number, because the mean of its divisors is an integer number (1410031728).

Almost surely, 2^19270431894 is an apocalyptic number.

19270431894 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19270431894 is an abundant number, since it is smaller than the sum of its proper divisors (25850583402).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19270431894 is a wasteful number, since it uses less digits than its factorization.

19270431894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11190780.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 19270431894 in words is "nineteen billion, two hundred seventy million, four hundred thirty-one thousand, eight hundred ninety-four".