19685587505272 has 64 divisors (see below), whose sum is σ = 40371313661280. Its totient is φ = 8944058714112.

The previous prime is 19685587505249. The next prime is 19685587505291. The reversal of 19685587505272 is 27250578558691.

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, 1491708 + ... + 6449524.

Almost surely, 2^{19685587505272} 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 19685587505272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20185656830640).

19685587505272 is an abundant number, since it is smaller than the sum of its proper divisors (20685726156008).

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

19685587505272 is a wasteful number, since it uses less digits than its factorization.

19685587505272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4958432 (or 4958428 counting only the distinct ones).

The product of its (nonzero) digits is 423360000, while the sum is 70.

The spelling of 19685587505272 in words is "nineteen trillion, six hundred eighty-five billion, five hundred eighty-seven million, five hundred five thousand, two hundred seventy-two".