19879734563484 has 96 divisors (see below), whose sum is σ = 48465082209600. Its totient is φ = 6334151577600.

The previous prime is 19879734563473. The next prime is 19879734563567. The reversal of 19879734563484 is 48436543797891.

It is a hoax number, since the sum of its digits (78) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 558448774 + ... + 558484370.

It is an arithmetic number, because the mean of its divisors is an integer number (504844606350).

Almost surely, 2^{19879734563484} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19879734563484, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24232541104800).

19879734563484 is an abundant number, since it is smaller than the sum of its proper divisors (28585347646116).

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

19879734563484 is a wasteful number, since it uses less digits than its factorization.

19879734563484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51623 (or 51621 counting only the distinct ones).

The product of its digits is 4389396480, while the sum is 78.

The spelling of 19879734563484 in words is "nineteen trillion, eight hundred seventy-nine billion, seven hundred thirty-four million, five hundred sixty-three thousand, four hundred eighty-four".