2019816456 has 192 divisors, whose sum is σ = 6077695680. Its totient is φ = 557383680.

The previous prime is 2019816437. The next prime is 2019816457. The reversal of 2019816456 is 6546189102.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (2019816457) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7859080 + ... + 7859336.

It is an arithmetic number, because the mean of its divisors is an integer number (31654665).

Almost surely, 2^2019816456 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 2019816456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3038847840).

2019816456 is an abundant number, since it is smaller than the sum of its proper divisors (4057879224).

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

2019816456 is a wasteful number, since it uses less digits than its factorization.

2019816456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 2019816456 is about 44942.3681619026. The cubic root of 2019816456 is about 1264.0685767019.

The spelling of 2019816456 in words is "two billion, nineteen million, eight hundred sixteen thousand, four hundred fifty-six".