19999783062 has 144 divisors (see below), whose sum is σ = 53492991552. Its totient is φ = 5581049040.

The previous prime is 19999783057. The next prime is 19999783081. The reversal of 19999783062 is 26038799991.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1014237 + ... + 1033767.

It is an arithmetic number, because the mean of its divisors is an integer number (371479108).

Almost surely, 2^19999783062 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 19999783062, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26746495776).

19999783062 is an abundant number, since it is smaller than the sum of its proper divisors (33493208490).

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

19999783062 is a wasteful number, since it uses less digits than its factorization.

19999783062 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19605 (or 19586 counting only the distinct ones).

The product of its (nonzero) digits is 13226976, while the sum is 63.

The spelling of 19999783062 in words is "nineteen billion, nine hundred ninety-nine million, seven hundred eighty-three thousand, sixty-two".