21450154544341 has 16 divisors (see below), whose sum is σ = 22198954892400. Its totient is φ = 20701965312000.

The previous prime is 21450154544309. The next prime is 21450154544389. The reversal of 21450154544341 is 14344545105412.

It can be written as a sum of positive squares in 8 ways, for example, as 2949222328900 + 18500932215441 = 1717330^2 + 4301271^2 .

It is a cyclic number.

It is not a de Polignac number, because 21450154544341 - 2⁵ = 21450154544309 is a prime.

It is a super-2 number, since 2×21450154544341² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21450154244341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1442601655 + ... + 1442616523.

It is an arithmetic number, because the mean of its divisors is an integer number (1387434680775).

Almost surely, 2^{21450154544341} is an apocalyptic number.

It is an amenable number.

21450154544341 is a deficient number, since it is larger than the sum of its proper divisors (748800348059).

21450154544341 is a wasteful number, since it uses less digits than its factorization.

21450154544341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32040.

The product of its (nonzero) digits is 768000, while the sum is 43.

Adding to 21450154544341 its reverse (14344545105412), we get a palindrome (35794699649753).

The spelling of 21450154544341 in words is "twenty-one trillion, four hundred fifty billion, one hundred fifty-four million, five hundred forty-four thousand, three hundred forty-one".