19956445080 has 512 divisors, whose sum is σ = 72503424000. Its totient is φ = 4330782720.

The previous prime is 19956445013. The next prime is 19956445087. The reversal of 19956445080 is 8054465991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19956445087) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 111488431 + ... + 111488609.

It is an arithmetic number, because the mean of its divisors is an integer number (141608250).

Almost surely, 2^19956445080 is an apocalyptic number.

19956445080 is a gapful number since it is divisible by the number (10) 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 19956445080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36251712000).

19956445080 is an abundant number, since it is smaller than the sum of its proper divisors (52546978920).

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

19956445080 is a wasteful number, since it uses less digits than its factorization.

19956445080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379 (or 375 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 51.

The spelling of 19956445080 in words is "nineteen billion, nine hundred fifty-six million, four hundred forty-five thousand, eighty".