16819387452 has 48 divisors (see below), whose sum is σ = 49835224320. Its totient is φ = 4805539056.

The previous prime is 16819387441. The next prime is 16819387457. The reversal of 16819387452 is 25478391861.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16819387457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11123178 + ... + 11124689.

It is an arithmetic number, because the mean of its divisors is an integer number (1038233840).

Almost surely, 2^16819387452 is an apocalyptic number.

16819387452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16819387452 is an abundant number, since it is smaller than the sum of its proper divisors (33015836868).

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

16819387452 is a wasteful number, since it uses less digits than its factorization.

16819387452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22247887 (or 22247879 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 16819387452 in words is "sixteen billion, eight hundred nineteen million, three hundred eighty-seven thousand, four hundred fifty-two".