19985437476 has 60 divisors (see below), whose sum is σ = 52309757808. Its totient is φ = 6653667888.

The previous prime is 19985437469. The next prime is 19985437543. The reversal of 19985437476 is 67473458991.

19985437476 is a `hidden beast` number, since 19 + 9 + 8 + 543 + 7 + 4 + 76 = 666.

It is a super-2 number, since 2×19985437476² (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 19 ways as a sum of consecutive naturals, for example, 230655 + ... + 305241.

Almost surely, 2^19985437476 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 19985437476, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26154878904).

19985437476 is an abundant number, since it is smaller than the sum of its proper divisors (32324320332).

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

19985437476 is a wasteful number, since it uses less digits than its factorization.

19985437476 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75430 (or 75419 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 19985437476 in words is "nineteen billion, nine hundred eighty-five million, four hundred thirty-seven thousand, four hundred seventy-six".