16720516450 has 48 divisors (see below), whose sum is σ = 34844448384. Its totient is φ = 5915851200.

The previous prime is 16720516429. The next prime is 16720516459. The reversal of 16720516450 is 5461502761.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (16720516459) 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 23 ways as a sum of consecutive naturals, for example, 390474 + ... + 431173.

It is an arithmetic number, because the mean of its divisors is an integer number (725926008).

Almost surely, 2^16720516450 is an apocalyptic number.

16720516450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16720516450 is an abundant number, since it is smaller than the sum of its proper divisors (18123931934).

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

16720516450 is a wasteful number, since it uses less digits than its factorization.

16720516450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821707 (or 821702 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 37.

The spelling of 16720516450 in words is "sixteen billion, seven hundred twenty million, five hundred sixteen thousand, four hundred fifty".