21243041010 has 192 divisors, whose sum is σ = 58920376320. Its totient is φ = 5295144960.

The previous prime is 21243041003. The next prime is 21243041011. The reversal of 21243041010 is 1014034212.

21243041010 is a `hidden beast` number, since 2 + 1 + 243 + 0 + 410 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (21243041011) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 63035562 + ... + 63035898.

It is an arithmetic number, because the mean of its divisors is an integer number (306876960).

Almost surely, 2^21243041010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21243041010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29460188160).

21243041010 is an abundant number, since it is smaller than the sum of its proper divisors (37677335310).

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

21243041010 is a wasteful number, since it uses less digits than its factorization.

21243041010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21243041010 its reverse (1014034212), we get a palindrome (22257075222).

The spelling of 21243041010 in words is "twenty-one billion, two hundred forty-three million, forty-one thousand, ten".