21533502520445 has 8 divisors (see below), whose sum is σ = 25943152042080. Its totient is φ = 17158169338000.

The previous prime is 21533502520373. The next prime is 21533502520573. The reversal of 21533502520445 is 54402520533512.

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

It is not a de Polignac number, because 21533502520445 - 2¹⁰ = 21533502519421 is a prime.

It is a super-2 number, since 2×21533502520445² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8579083415 + ... + 8579085924.

It is an arithmetic number, because the mean of its divisors is an integer number (3242894005260).

Almost surely, 2^{21533502520445} is an apocalyptic number.

It is an amenable number.

21533502520445 is a deficient number, since it is larger than the sum of its proper divisors (4409649521635).

21533502520445 is a wasteful number, since it uses less digits than its factorization.

21533502520445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17158169595.

The product of its (nonzero) digits is 720000, while the sum is 41.

The spelling of 21533502520445 in words is "twenty-one trillion, five hundred thirty-three billion, five hundred two million, five hundred twenty thousand, four hundred forty-five".