21440520500219 has 4 divisors (see below), whose sum is σ = 22179848793360. Its totient is φ = 20701192207080.

The previous prime is 21440520500197. The next prime is 21440520500263. The reversal of 21440520500219 is 91200502504412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21440520500219 - 2⁸ = 21440520499963 is a prime.

It is a super-3 number, since 3×21440520500219³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21440520500279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369664146527 + ... + 369664146584.

It is an arithmetic number, because the mean of its divisors is an integer number (5544962198340).

Almost surely, 2^{21440520500219} is an apocalyptic number.

21440520500219 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21440520500219 is a deficient number, since it is larger than the sum of its proper divisors (739328293141).

21440520500219 is an equidigital number, since it uses as much as digits as its factorization.

21440520500219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739328293140.

The product of its (nonzero) digits is 28800, while the sum is 35.

The spelling of 21440520500219 in words is "twenty-one trillion, four hundred forty billion, five hundred twenty million, five hundred thousand, two hundred nineteen".