21529088541320 has 128 divisors (see below), whose sum is σ = 49857530486400. Its totient is φ = 8361732556800.

The previous prime is 21529088541299. The next prime is 21529088541353. The reversal of 21529088541320 is 2314588092512.

It is a super-2 number, since 2×21529088541320² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1151833175 + ... + 1151851865.

It is an arithmetic number, because the mean of its divisors is an integer number (389511956925).

Almost surely, 2^{21529088541320} is an apocalyptic number.

21529088541320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21529088541320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24928765243200).

21529088541320 is an abundant number, since it is smaller than the sum of its proper divisors (28328441945080).

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

21529088541320 is a wasteful number, since it uses less digits than its factorization.

21529088541320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22039 (or 22035 counting only the distinct ones).

The product of its (nonzero) digits is 1382400, while the sum is 50.

The spelling of 21529088541320 in words is "twenty-one trillion, five hundred twenty-nine billion, eighty-eight million, five hundred forty-one thousand, three hundred twenty".