21044313034400 has 72 divisors (see below), whose sum is σ = 51395992570944. Its totient is φ = 8414192044800.

The previous prime is 21044313034363. The next prime is 21044313034417. The reversal of 21044313034400 is 443031344012.

It is a happy number.

It is a super-2 number, since 2×21044313034400² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3612986 + ... + 7425785.

It is an arithmetic number, because the mean of its divisors is an integer number (713833230152).

Almost surely, 2^{21044313034400} is an apocalyptic number.

21044313034400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21044313034400 is an abundant number, since it is smaller than the sum of its proper divisors (30351679536544).

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

21044313034400 is a wasteful number, since it uses less digits than its factorization.

21044313034400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11041174 (or 11041161 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

Adding to 21044313034400 its reverse (443031344012), we get a palindrome (21487344378412).

The spelling of 21044313034400 in words is "twenty-one trillion, forty-four billion, three hundred thirteen million, thirty-four thousand, four hundred".