21500202620343 has 32 divisors (see below), whose sum is σ = 30883140921600. Its totient is φ = 13260852976896.

The previous prime is 21500202620333. The next prime is 21500202620357. The reversal of 21500202620343 is 34302620200512.

It is not a de Polignac number, because 21500202620343 - 2¹³ = 21500202612151 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21500202620343.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21500202620333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12623323 + ... + 14224931.

It is an arithmetic number, because the mean of its divisors is an integer number (965098153800).

Almost surely, 2^{21500202620343} is an apocalyptic number.

21500202620343 is a deficient number, since it is larger than the sum of its proper divisors (9382938301257).

21500202620343 is a wasteful number, since it uses less digits than its factorization.

21500202620343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607151.

The product of its (nonzero) digits is 17280, while the sum is 30.

Adding to 21500202620343 its reverse (34302620200512), we get a palindrome (55802822820855).

The spelling of 21500202620343 in words is "twenty-one trillion, five hundred billion, two hundred two million, six hundred twenty thousand, three hundred forty-three".