19808503008 has 96 divisors (see below), whose sum is σ = 61342525440. Its totient is φ = 5476999680.

The previous prime is 19808502907. The next prime is 19808503009. The reversal of 19808503008 is 80030580891.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19808503009) 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, 454603 + ... + 496266.

It is an arithmetic number, because the mean of its divisors is an integer number (638984640).

Almost surely, 2^19808503008 is an apocalyptic number.

It is an amenable number.

19808503008 is an abundant number, since it is smaller than the sum of its proper divisors (41534022432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19808503008 is a wasteful number, since it uses less digits than its factorization.

19808503008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 950920 (or 950912 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 19808503008 in words is "nineteen billion, eight hundred eight million, five hundred three thousand, eight".