21050510241 has 8 divisors (see below), whose sum is σ = 28069234240. Its totient is φ = 14032729872.

The previous prime is 21050510237. The next prime is 21050510249. The reversal of 21050510241 is 14201505012.

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

It is not a de Polignac number, because 21050510241 - 2² = 21050510237 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21050510249) 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, 182101 + ... + 274338.

It is an arithmetic number, because the mean of its divisors is an integer number (3508654280).

Almost surely, 2^21050510241 is an apocalyptic number.

It is an amenable number.

21050510241 is a deficient number, since it is larger than the sum of its proper divisors (7018723999).

21050510241 is a wasteful number, since it uses less digits than its factorization.

21050510241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471815.

The product of its (nonzero) digits is 400, while the sum is 21.

The spelling of 21050510241 in words is "twenty-one billion, fifty million, five hundred ten thousand, two hundred forty-one".