19916723603 has 24 divisors (see below), whose sum is σ = 23295951072. Its totient is φ = 16977752064.

The previous prime is 19916723573. The next prime is 19916723611. The reversal of 19916723603 is 30632761991.

It is not a de Polignac number, because 19916723603 - 2⁶ = 19916723539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19916723653) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13763426 + ... + 13764872.

It is an arithmetic number, because the mean of its divisors is an integer number (970664628).

Almost surely, 2^19916723603 is an apocalyptic number.

19916723603 is a deficient number, since it is larger than the sum of its proper divisors (3379227469).

19916723603 is a wasteful number, since it uses less digits than its factorization.

19916723603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2811 (or 2804 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 47.

The spelling of 19916723603 in words is "nineteen billion, nine hundred sixteen million, seven hundred twenty-three thousand, six hundred three".