21502055700389 has 8 divisors (see below), whose sum is σ = 23456836477632. Its totient is φ = 19547282996640.

The previous prime is 21502055700329. The next prime is 21502055700491. The reversal of 21502055700389 is 98300755020512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21502055700389 - 2¹⁶ = 21502055634853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21502055700319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4452257 + ... + 7926329.

It is an arithmetic number, because the mean of its divisors is an integer number (2932104559704).

Almost surely, 2^{21502055700389} is an apocalyptic number.

It is an amenable number.

21502055700389 is a deficient number, since it is larger than the sum of its proper divisors (1954780777243).

21502055700389 is a wasteful number, since it uses less digits than its factorization.

21502055700389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4036747.

The product of its (nonzero) digits is 756000, while the sum is 47.

The spelling of 21502055700389 in words is "twenty-one trillion, five hundred two billion, fifty-five million, seven hundred thousand, three hundred eighty-nine".