21026410230 has 128 divisors (see below), whose sum is σ = 60823249920. Its totient is φ = 4544432640.

The previous prime is 21026410217. The next prime is 21026410231. The reversal of 21026410230 is 3201462012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 21026410197 and 21026410206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21026410231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2217700 + ... + 2227160.

It is an arithmetic number, because the mean of its divisors is an integer number (475181640).

Almost surely, 2^21026410230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21026410230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30411624960).

21026410230 is an abundant number, since it is smaller than the sum of its proper divisors (39796839690).

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

21026410230 is a wasteful number, since it uses less digits than its factorization.

21026410230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10054.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21026410230 its reverse (3201462012), we get a palindrome (24227872242).

The spelling of 21026410230 in words is "twenty-one billion, twenty-six million, four hundred ten thousand, two hundred thirty".