21532341546 has 96 divisors (see below), whose sum is σ = 49564944000. Its totient is φ = 6736846464.

The previous prime is 21532341487. The next prime is 21532341563. The reversal of 21532341546 is 64514323512.

21532341546 is a `hidden beast` number, since 2 + 1 + 53 + 23 + 41 + 546 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21532341546.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25973460 + ... + 25974288.

It is an arithmetic number, because the mean of its divisors is an integer number (516301500).

Almost surely, 2^21532341546 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21532341546, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24782472000).

21532341546 is an abundant number, since it is smaller than the sum of its proper divisors (28032602454).

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

21532341546 is a wasteful number, since it uses less digits than its factorization.

21532341546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468 (or 1465 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The spelling of 21532341546 in words is "twenty-one billion, five hundred thirty-two million, three hundred forty-one thousand, five hundred forty-six".