21014403210 has 256 divisors, whose sum is σ = 58506624000. Its totient is φ = 5364817920.

The previous prime is 21014403173. The next prime is 21014403217. The reversal of 21014403210 is 1230441012.

21014403210 is a `hidden beast` number, since 2 + 10 + 1 + 440 + 3 + 210 = 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 (21014403217) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 185968114 + ... + 185968226.

It is an arithmetic number, because the mean of its divisors is an integer number (228541500).

Almost surely, 2^21014403210 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21014403210, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29253312000).

21014403210 is an abundant number, since it is smaller than the sum of its proper divisors (37492220790).

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

21014403210 is a wasteful number, since it uses less digits than its factorization.

21014403210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 392 counting only the distinct ones).

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

Adding to 21014403210 its reverse (1230441012), we get a palindrome (22244844222).

The spelling of 21014403210 in words is "twenty-one billion, fourteen million, four hundred three thousand, two hundred ten".