21532405041 has 160 divisors (see below), whose sum is σ = 39451281408. Its totient is φ = 11443783680.

The previous prime is 21532405001. The next prime is 21532405073. The reversal of 21532405041 is 14050423512.

21532405041 is a `hidden beast` number, since 2 + 1 + 532 + 40 + 50 + 41 = 666.

It is not a de Polignac number, because 21532405041 - 2⁶ = 21532404977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 21532404996 and 21532405014.

It is not an unprimeable number, because it can be changed into a prime (21532405001) by changing a digit.

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 159 ways as a sum of consecutive naturals, for example, 73489291 + ... + 73489583.

Almost surely, 2^21532405041 is an apocalyptic number.

21532405041 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

21532405041 is a deficient number, since it is larger than the sum of its proper divisors (17918876367).

21532405041 is a wasteful number, since it uses less digits than its factorization.

21532405041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493 (or 484 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

Adding to 21532405041 its reverse (14050423512), we get a palindrome (35582828553).

The spelling of 21532405041 in words is "twenty-one billion, five hundred thirty-two million, four hundred five thousand, forty-one".