19310147257 has 4 divisors (see below), whose sum is σ = 19310826276. Its totient is φ = 19309468240.

The previous prime is 19310147231. The next prime is 19310147309. The reversal of 19310147257 is 75274101391.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 15991119936 + 3319027321 = 126456^2 + 57611^2 .

It is a cyclic number.

It is not a de Polignac number, because 19310147257 - 2¹¹ = 19310145209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19310147657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294898 + ... + 354379.

It is an arithmetic number, because the mean of its divisors is an integer number (4827706569).

Almost surely, 2^19310147257 is an apocalyptic number.

It is an amenable number.

19310147257 is a deficient number, since it is larger than the sum of its proper divisors (679019).

19310147257 is an equidigital number, since it uses as much as digits as its factorization.

19310147257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 679018.

The product of its (nonzero) digits is 52920, while the sum is 40.

The spelling of 19310147257 in words is "nineteen billion, three hundred ten million, one hundred forty-seven thousand, two hundred fifty-seven".