16021323253020 has 48 divisors (see below), whose sum is σ = 45012809953440. Its totient is φ = 4257771453696.

The previous prime is 16021323253009. The next prime is 16021323253043. The reversal of 16021323253020 is 2035232312061.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455651455 + ... + 455686614.

It is an arithmetic number, because the mean of its divisors is an integer number (937766874030).

Almost surely, 2^{16021323253020} is an apocalyptic number.

16021323253020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16021323253020 is an abundant number, since it is smaller than the sum of its proper divisors (28991486700420).

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

16021323253020 is a wasteful number, since it uses less digits than its factorization.

16021323253020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911338374 (or 911338372 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 30.

Adding to 16021323253020 its reverse (2035232312061), we get a palindrome (18056555565081).

The spelling of 16021323253020 in words is "sixteen trillion, twenty-one billion, three hundred twenty-three million, two hundred fifty-three thousand, twenty".