21504225330533 has 8 divisors (see below), whose sum is σ = 23459213637120. Its totient is φ = 19549246812480.

The previous prime is 21504225330529. The next prime is 21504225330551. The reversal of 21504225330533 is 33503352240512.

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

It is not a de Polignac number, because 21504225330533 - 2² = 21504225330529 is a prime.

It is a super-2 number, since 2×21504225330533² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21504225330563) 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, 2598716 + ... + 7054202.

It is an arithmetic number, because the mean of its divisors is an integer number (2932401704640).

Almost surely, 2^{21504225330533} is an apocalyptic number.

It is an amenable number.

21504225330533 is a deficient number, since it is larger than the sum of its proper divisors (1954988306587).

21504225330533 is a wasteful number, since it uses less digits than its factorization.

21504225330533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4894267.

The product of its (nonzero) digits is 324000, while the sum is 38.

The spelling of 21504225330533 in words is "twenty-one trillion, five hundred four billion, two hundred twenty-five million, three hundred thirty thousand, five hundred thirty-three".