19724985503 has 8 divisors (see below), whose sum is σ = 19862425728. Its totient is φ = 19587745944.

The previous prime is 19724985491. The next prime is 19724985509. The reversal of 19724985503 is 30558942791.

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 19724985503 - 2²⁰ = 19723936927 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19724985509) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 149876 + ... + 248822.

It is an arithmetic number, because the mean of its divisors is an integer number (2482803216).

Almost surely, 2^19724985503 is an apocalyptic number.

19724985503 is a deficient number, since it is larger than the sum of its proper divisors (137440225).

19724985503 is a wasteful number, since it uses less digits than its factorization.

19724985503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100333.

The product of its (nonzero) digits is 2721600, while the sum is 53.

The spelling of 19724985503 in words is "nineteen billion, seven hundred twenty-four million, nine hundred eighty-five thousand, five hundred three".