21520553574302 has 8 divisors (see below), whose sum is σ = 32443045590000. Its totient is φ = 10706205044304.

The previous prime is 21520553574287. The next prime is 21520553574347. The reversal of 21520553574302 is 20347535502512.

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

It is a super-2 number, since 2×21520553574302² (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 3 ways as a sum of consecutive naturals, for example, 27035870927 + ... + 27035871722.

It is an arithmetic number, because the mean of its divisors is an integer number (4055380698750).

Almost surely, 2^{21520553574302} is an apocalyptic number.

21520553574302 is a deficient number, since it is larger than the sum of its proper divisors (10922492015698).

21520553574302 is a wasteful number, since it uses less digits than its factorization.

21520553574302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54071742850.

The product of its (nonzero) digits is 1260000, while the sum is 44.

The spelling of 21520553574302 in words is "twenty-one trillion, five hundred twenty billion, five hundred fifty-three million, five hundred seventy-four thousand, three hundred two".