21204503344200 has 192 divisors, whose sum is σ = 75483974073600. Its totient is φ = 4869933753600.

The previous prime is 21204503344183. The next prime is 21204503344217. The reversal of 21204503344200 is 244330540212.

It is an interprime number because it is at equal distance from previous prime (21204503344183) and next prime (21204503344217).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84422062 + ... + 84672861.

It is an arithmetic number, because the mean of its divisors is an integer number (393145698300).

Almost surely, 2^{21204503344200} is an apocalyptic number.

21204503344200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21204503344200 is an abundant number, since it is smaller than the sum of its proper divisors (54279470729400).

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

21204503344200 is a wasteful number, since it uses less digits than its factorization.

21204503344200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169094972 (or 169094963 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 21204503344200 its reverse (244330540212), we get a palindrome (21448833884412).

The spelling of 21204503344200 in words is "twenty-one trillion, two hundred four billion, five hundred three million, three hundred forty-four thousand, two hundred".