21375133157752 has 32 divisors (see below), whose sum is σ = 43826211475200. Its totient is φ = 9692781128800.

The previous prime is 21375133157723. The next prime is 21375133157753. The reversal of 21375133157752 is 25775133157312.

It is a self number, because there is not a number n which added to its sum of digits gives 21375133157752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21375133157753) 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 7 ways as a sum of consecutive naturals, for example, 289819024 + ... + 289892767.

It is an arithmetic number, because the mean of its divisors is an integer number (1369569108600).

Almost surely, 2^{21375133157752} is an apocalyptic number.

21375133157752 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21375133157752 is an abundant number, since it is smaller than the sum of its proper divisors (22451078317448).

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

21375133157752 is a wasteful number, since it uses less digits than its factorization.

21375133157752 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579712227 (or 579712223 counting only the distinct ones).

The product of its digits is 4630500, while the sum is 52.

The spelling of 21375133157752 in words is "twenty-one trillion, three hundred seventy-five billion, one hundred thirty-three million, one hundred fifty-seven thousand, seven hundred fifty-two".