19963870480 has 80 divisors (see below), whose sum is σ = 47105110080. Its totient is φ = 7867528704.

The previous prime is 19963870477. The next prime is 19963870499. The reversal of 19963870480 is 8407836991.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×19963870480² (a number of 21 digits) contains 22 as substring.

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, 2512594 + ... + 2520526.

It is an arithmetic number, because the mean of its divisors is an integer number (588813876).

Almost surely, 2^19963870480 is an apocalyptic number.

19963870480 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 19963870480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23552555040).

19963870480 is an abundant number, since it is smaller than the sum of its proper divisors (27141239600).

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

19963870480 is a wasteful number, since it uses less digits than its factorization.

19963870480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8408 (or 8402 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 19963870480 in words is "nineteen billion, nine hundred sixty-three million, eight hundred seventy thousand, four hundred eighty".