19985469504 has 672 divisors, whose sum is σ = 75323151360. Its totient is φ = 4528742400.

The previous prime is 19985469503. The next prime is 19985469521. The reversal of 19985469504 is 40596458991.

It is a tau number, because it is divible by the number of its divisors (672).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19985469503) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 47471214 + ... + 47471634.

Almost surely, 2^19985469504 is an apocalyptic number.

19985469504 is a gapful number since it is divisible by the number (14) 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 19985469504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37661575680).

19985469504 is an abundant number, since it is smaller than the sum of its proper divisors (55337681856).

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

19985469504 is a wasteful number, since it uses less digits than its factorization.

19985469504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 476 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 60.

The spelling of 19985469504 in words is "nineteen billion, nine hundred eighty-five million, four hundred sixty-nine thousand, five hundred four".