19672651008 has 144 divisors (see below), whose sum is σ = 58282943040. Its totient is φ = 6545442816.

The previous prime is 19672650983. The next prime is 19672651051. The reversal of 19672651008 is 80015627691.

It is a tau number, because it is divible by the number of its divisors (144).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4234735 + ... + 4239377.

It is an arithmetic number, because the mean of its divisors is an integer number (404742660).

Almost surely, 2^19672651008 is an apocalyptic number.

19672651008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19672651008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29141471520).

19672651008 is an abundant number, since it is smaller than the sum of its proper divisors (38610292032).

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

19672651008 is an equidigital number, since it uses as much as digits as its factorization.

19672651008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5281 (or 5261 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The spelling of 19672651008 in words is "nineteen billion, six hundred seventy-two million, six hundred fifty-one thousand, eight".