21250411441254 has 80 divisors (see below), whose sum is σ = 48482724050640. Its totient is φ = 6954927468480.

The previous prime is 21250411441249. The next prime is 21250411441271. The reversal of 21250411441254 is 45214411405212.

It is a happy number.

21250411441254 is a `hidden beast` number, since 2 + 1 + 2 + 504 + 1 + 144 + 1 + 2 + 5 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6493092 + ... + 9201144.

It is an arithmetic number, because the mean of its divisors is an integer number (606034050633).

Almost surely, 2^{21250411441254} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21250411441254, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24241362025320).

21250411441254 is an abundant number, since it is smaller than the sum of its proper divisors (27232312609386).

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

21250411441254 is a wasteful number, since it uses less digits than its factorization.

21250411441254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2708947 (or 2708938 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

Adding to 21250411441254 its reverse (45214411405212), we get a palindrome (66464822846466).

The spelling of 21250411441254 in words is "twenty-one trillion, two hundred fifty billion, four hundred eleven million, four hundred forty-one thousand, two hundred fifty-four".