21035444510400 has 168 divisors, whose sum is σ = 69412713898704. Its totient is φ = 5577027072000.

The previous prime is 21035444510387. The next prime is 21035444510429. The reversal of 21035444510400 is 401544453012.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11835451 + ... + 13496250.

Almost surely, 2^{21035444510400} is an apocalyptic number.

21035444510400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21035444510400 is an abundant number, since it is smaller than the sum of its proper divisors (48377269388304).

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

21035444510400 is a wasteful number, since it uses less digits than its factorization.

21035444510400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25331899 (or 25331884 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 33.

Adding to 21035444510400 its reverse (401544453012), we get a palindrome (21436988963412).

The spelling of 21035444510400 in words is "twenty-one trillion, thirty-five billion, four hundred forty-four million, five hundred ten thousand, four hundred".