21244301000 has 64 divisors (see below), whose sum is σ = 53535671280. Its totient is φ = 7844044800.

The previous prime is 21244300999. The next prime is 21244301017. The reversal of 21244301000 is 10344212.

It can be written as a sum of positive squares in 8 ways, for example, as 1078596964 + 20165704036 = 32842^2 + 142006^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 21244301000.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 804089 + ... + 830088.

Almost surely, 2^21244301000 is an apocalyptic number.

21244301000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21244301000 is an abundant number, since it is smaller than the sum of its proper divisors (32291370280).

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

21244301000 is a wasteful number, since it uses less digits than its factorization.

21244301000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1634211 (or 1634197 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21244301000 its reverse (10344212), we get a palindrome (21254645212).

The spelling of 21244301000 in words is "twenty-one billion, two hundred forty-four million, three hundred one thousand".