21523341532 has 72 divisors (see below), whose sum is σ = 48049763328. Its totient is φ = 8341653600.

The previous prime is 21523341517. The next prime is 21523341547. The reversal of 21523341532 is 23514332512.

It is an interprime number because it is at equal distance from previous prime (21523341517) and next prime (21523341547).

It is a super-2 number, since 2×21523341532² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21523341494 and 21523341503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 385663 + ... + 437929.

It is an arithmetic number, because the mean of its divisors is an integer number (667357824).

Almost surely, 2^21523341532 is an apocalyptic number.

21523341532 is a gapful number since it is divisible by the number (22) 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 21523341532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24024881664).

21523341532 is an abundant number, since it is smaller than the sum of its proper divisors (26526421796).

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

21523341532 is a wasteful number, since it uses less digits than its factorization.

21523341532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52487 (or 52478 counting only the distinct ones).

The product of its digits is 21600, while the sum is 31.

The spelling of 21523341532 in words is "twenty-one billion, five hundred twenty-three million, three hundred forty-one thousand, five hundred thirty-two".