19727491270 has 16 divisors (see below), whose sum is σ = 35527337280. Its totient is φ = 7887029184.

The previous prime is 19727491261. The next prime is 19727491291. The reversal of 19727491270 is 7219472791.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 474990 + ... + 514849.

It is an arithmetic number, because the mean of its divisors is an integer number (2220458580).

Almost surely, 2^19727491270 is an apocalyptic number.

19727491270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19727491270 is a deficient number, since it is larger than the sum of its proper divisors (15799846010).

19727491270 is a wasteful number, since it uses less digits than its factorization.

19727491270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991839.

The product of its (nonzero) digits is 444528, while the sum is 49.

The spelling of 19727491270 in words is "nineteen billion, seven hundred twenty-seven million, four hundred ninety-one thousand, two hundred seventy".