21649052441 has 8 divisors (see below), whose sum is σ = 22944777984. Its totient is φ = 20355799360.

The previous prime is 21649052437. The next prime is 21649052449. The reversal of 21649052441 is 14425094612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21649052441 - 2² = 21649052437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21649052395 and 21649052404.

It is not an unprimeable number, because it can be changed into a prime (21649052449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600065 + ... + 635118.

It is an arithmetic number, because the mean of its divisors is an integer number (2868097248).

Almost surely, 2^21649052441 is an apocalyptic number.

It is an amenable number.

21649052441 is a deficient number, since it is larger than the sum of its proper divisors (1295725543).

21649052441 is a wasteful number, since it uses less digits than its factorization.

21649052441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1236231.

The product of its (nonzero) digits is 69120, while the sum is 38.

The spelling of 21649052441 in words is "twenty-one billion, six hundred forty-nine million, fifty-two thousand, four hundred forty-one".