21752149535999 has 8 divisors (see below), whose sum is σ = 22502324244960. Its totient is φ = 21001981532896.

The previous prime is 21752149535989. The next prime is 21752149536083. The reversal of 21752149535999 is 99953594125712.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21752149535999 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 (21752149535939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5434142 + ... + 8546004.

It is an arithmetic number, because the mean of its divisors is an integer number (2812790530620).

Almost surely, 2^{21752149535999} is an apocalyptic number.

21752149535999 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

21752149535999 is a deficient number, since it is larger than the sum of its proper divisors (750174708961).

21752149535999 is a wasteful number, since it uses less digits than its factorization.

21752149535999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3352929.

The product of its digits is 275562000, while the sum is 71.

The spelling of 21752149535999 in words is "twenty-one trillion, seven hundred fifty-two billion, one hundred forty-nine million, five hundred thirty-five thousand, nine hundred ninety-nine".