19499599803 has 16 divisors (see below), whose sum is σ = 26312549760. Its totient is φ = 12843424704.

The previous prime is 19499599793. The next prime is 19499599837. The reversal of 19499599803 is 30899599491.

It is not a de Polignac number, because 19499599803 - 2⁴ = 19499599787 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19499599883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 314100 + ... + 371022.

It is an arithmetic number, because the mean of its divisors is an integer number (1644534360).

Almost surely, 2^19499599803 is an apocalyptic number.

19499599803 is a deficient number, since it is larger than the sum of its proper divisors (6812949957).

19499599803 is a wasteful number, since it uses less digits than its factorization.

19499599803 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58298.

The product of its (nonzero) digits is 28343520, while the sum is 66.

The spelling of 19499599803 in words is "nineteen billion, four hundred ninety-nine million, five hundred ninety-nine thousand, eight hundred three".