19427045247 has 12 divisors (see below), whose sum is σ = 28116424440. Its totient is φ = 12925915728.

The previous prime is 19427045221. The next prime is 19427045251. The reversal of 19427045247 is 74254072491.

19427045247 is a `hidden beast` number, since 1 + 94 + 2 + 70 + 452 + 47 = 666.

It is not a de Polignac number, because 19427045247 - 2⁷ = 19427045119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19427045747) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2115813 + ... + 2124974.

It is an arithmetic number, because the mean of its divisors is an integer number (2343035370).

Almost surely, 2^19427045247 is an apocalyptic number.

19427045247 is a deficient number, since it is larger than the sum of its proper divisors (8689379193).

19427045247 is a wasteful number, since it uses less digits than its factorization.

19427045247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4241302 (or 4241299 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 19427045247 in words is "nineteen billion, four hundred twenty-seven million, forty-five thousand, two hundred forty-seven".