21010430650 has 24 divisors (see below), whose sum is σ = 42632074944. Its totient is φ = 7640156400.

The previous prime is 21010430627. The next prime is 21010430663. The reversal of 21010430650 is 5603401012.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19099842 + ... + 19100941.

It is an arithmetic number, because the mean of its divisors is an integer number (1776336456).

Almost surely, 2^21010430650 is an apocalyptic number.

21010430650 is an abundant number, since it is smaller than the sum of its proper divisors (21621644294).

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

21010430650 is a wasteful number, since it uses less digits than its factorization.

21010430650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38200806 (or 38200801 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

Adding to 21010430650 its reverse (5603401012), we get a palindrome (26613831662).

The spelling of 21010430650 in words is "twenty-one billion, ten million, four hundred thirty thousand, six hundred fifty".