21006230360 has 32 divisors (see below), whose sum is σ = 47279367360. Its totient is φ = 8399763456.

The previous prime is 21006230351. The next prime is 21006230407. The reversal of 21006230360 is 6303260012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41777 + ... + 209183.

It is an arithmetic number, because the mean of its divisors is an integer number (1477480230).

Almost surely, 2^21006230360 is an apocalyptic number.

21006230360 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21006230360 is an abundant number, since it is smaller than the sum of its proper divisors (26273137000).

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

21006230360 is a wasteful number, since it uses less digits than its factorization.

21006230360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 170555 (or 170551 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21006230360 its reverse (6303260012), we get a palindrome (27309490372).

The spelling of 21006230360 in words is "twenty-one billion, six million, two hundred thirty thousand, three hundred sixty".