19589477439894 has 36 divisors (see below), whose sum is σ = 39238260434676. Its totient is φ = 6519956487264.

The previous prime is 19589477439871. The next prime is 19589477439901. The reversal of 19589477439894 is 49893477498591.

It is a self number, because there is not a number n which added to its sum of digits gives 19589477439894.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12174938562 + ... + 12174940170.

It is an arithmetic number, because the mean of its divisors is an integer number (1089951678741).

Almost surely, 2^{19589477439894} is an apocalyptic number.

19589477439894 is an abundant number, since it is smaller than the sum of its proper divisors (19648782994782).

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

19589477439894 is an frugal number, since it uses more digits than its factorization.

19589477439894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5469 (or 2737 counting only the distinct ones).

The product of its digits is 19752284160, while the sum is 87.

The spelling of 19589477439894 in words is "nineteen trillion, five hundred eighty-nine billion, four hundred seventy-seven million, four hundred thirty-nine thousand, eight hundred ninety-four".