19730857403 has 8 divisors (see below), whose sum is σ = 20250357840. Its totient is φ = 19217975040.

The previous prime is 19730857387. The next prime is 19730857451. The reversal of 19730857403 is 30475803791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19730857403 - 2⁴ = 19730857387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19730857453) 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 7 ways as a sum of consecutive naturals, for example, 1648478 + ... + 1660403.

It is an arithmetic number, because the mean of its divisors is an integer number (2531294730).

Almost surely, 2^19730857403 is an apocalyptic number.

19730857403 is a deficient number, since it is larger than the sum of its proper divisors (519500437).

19730857403 is an equidigital number, since it uses as much as digits as its factorization.

19730857403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3309037.

The product of its (nonzero) digits is 635040, while the sum is 47.

The spelling of 19730857403 in words is "nineteen billion, seven hundred thirty million, eight hundred fifty-seven thousand, four hundred three".