21044104233400 has 96 divisors (see below), whose sum is σ = 49226872091040. Its totient is φ = 8366157135360.

The previous prime is 21044104233379. The next prime is 21044104233469. The reversal of 21044104233400 is 433240144012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 289775494 + ... + 289848106.

It is an arithmetic number, because the mean of its divisors is an integer number (512779917615).

Almost surely, 2^{21044104233400} is an apocalyptic number.

21044104233400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21044104233400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24613436045520).

21044104233400 is an abundant number, since it is smaller than the sum of its proper divisors (28182767857640).

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

21044104233400 is a wasteful number, since it uses less digits than its factorization.

21044104233400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81473 (or 81464 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 21044104233400 its reverse (433240144012), we get a palindrome (21477344377412).

The spelling of 21044104233400 in words is "twenty-one trillion, forty-four billion, one hundred four million, two hundred thirty-three thousand, four hundred".