19979539603 has 2 divisors, whose sum is σ = 19979539604. Its totient is φ = 19979539602.

The previous prime is 19979539597. The next prime is 19979539621. The reversal of 19979539603 is 30693597991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 19979539603 - 2²¹ = 19977442451 is a prime.

It is a super-3 number, since 3×19979539603³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (19979539673) 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 as a sum of consecutive naturals, namely, 9989769801 + 9989769802.

It is an arithmetic number, because the mean of its divisors is an integer number (9989769802).

Almost surely, 2^19979539603 is an apocalyptic number.

19979539603 is a deficient number, since it is larger than the sum of its proper divisors (1).

19979539603 is an equidigital number, since it uses as much as digits as its factorization.

19979539603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12400290, while the sum is 61.

The spelling of 19979539603 in words is "nineteen billion, nine hundred seventy-nine million, five hundred thirty-nine thousand, six hundred three".