21545541341430 has 32 divisors (see below), whose sum is σ = 54751022704224. Its totient is φ = 5407508414976.

The previous prime is 21545541341419. The next prime is 21545541341431. The reversal of 21545541341430 is 3414314554512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21545541341431) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 21123079237 + ... + 21123080256.

It is an arithmetic number, because the mean of its divisors is an integer number (1710969459507).

Almost surely, 2^{21545541341430} is an apocalyptic number.

21545541341430 is an abundant number, since it is smaller than the sum of its proper divisors (33205481362794).

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

21545541341430 is a wasteful number, since it uses less digits than its factorization.

21545541341430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42246159520.

The product of its (nonzero) digits is 576000, while the sum is 42.

Adding to 21545541341430 its reverse (3414314554512), we get a palindrome (24959855895942).

The spelling of 21545541341430 in words is "twenty-one trillion, five hundred forty-five billion, five hundred forty-one million, three hundred forty-one thousand, four hundred thirty".