21352532441 has 4 divisors (see below), whose sum is σ = 21609791952. Its totient is φ = 21095272932.

The previous prime is 21352532431. The next prime is 21352532449. The reversal of 21352532441 is 14423525312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21352532441 - 2¹⁴ = 21352516057 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21352532398 and 21352532407.

It is not an unprimeable number, because it can be changed into a prime (21352532449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128629631 + ... + 128629796.

It is an arithmetic number, because the mean of its divisors is an integer number (5402447988).

Almost surely, 2^21352532441 is an apocalyptic number.

It is an amenable number.

21352532441 is a deficient number, since it is larger than the sum of its proper divisors (257259511).

21352532441 is an equidigital number, since it uses as much as digits as its factorization.

21352532441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257259510.

The product of its digits is 28800, while the sum is 32.

The spelling of 21352532441 in words is "twenty-one billion, three hundred fifty-two million, five hundred thirty-two thousand, four hundred forty-one".