21375133534352 has 80 divisors (see below), whose sum is σ = 46041223506432. Its totient is φ = 9546692935680.

The previous prime is 21375133534331. The next prime is 21375133534427. The reversal of 21375133534352 is 25343533157312.

It is a super-2 number, since 2×21375133534352² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21375133534297 and 21375133534306.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136019408 + ... + 136176464.

Almost surely, 2^{21375133534352} is an apocalyptic number.

It is an amenable number.

21375133534352 is an abundant number, since it is smaller than the sum of its proper divisors (24666089972080).

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

21375133534352 is a wasteful number, since it uses less digits than its factorization.

21375133534352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 178216 (or 178210 counting only the distinct ones).

The product of its digits is 3402000, while the sum is 47.

The spelling of 21375133534352 in words is "twenty-one trillion, three hundred seventy-five billion, one hundred thirty-three million, five hundred thirty-four thousand, three hundred fifty-two".