21051425241450 has 192 divisors, whose sum is σ = 64653294960000. Its totient is φ = 5005416176640.

The previous prime is 21051425241443. The next prime is 21051425241491. The reversal of 21051425241450 is 5414252415012.

21051425241450 is a `hidden beast` number, since 2 + 1 + 0 + 5 + 142 + 52 + 414 + 50 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 23702725 + ... + 24574824.

It is an arithmetic number, because the mean of its divisors is an integer number (336735911250).

Almost surely, 2^{21051425241450} is an apocalyptic number.

21051425241450 is an abundant number, since it is smaller than the sum of its proper divisors (43601869718550).

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

21051425241450 is a wasteful number, since it uses less digits than its factorization.

21051425241450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48277606 (or 48277595 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 36.

Adding to 21051425241450 its reverse (5414252415012), we get a palindrome (26465677656462).

The spelling of 21051425241450 in words is "twenty-one trillion, fifty-one billion, four hundred twenty-five million, two hundred forty-one thousand, four hundred fifty".