21545443434350 has 384 divisors, whose sum is σ = 48283763641344. Its totient is φ = 7063879680000.

The previous prime is 21545443434343. The next prime is 21545443434379. The reversal of 21545443434350 is 5343434454512.

It is a super-2 number, since 2×21545443434350² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21545443434295 and 21545443434304.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 4871226239 + ... + 4871230661.

It is an arithmetic number, because the mean of its divisors is an integer number (125738967816).

Almost surely, 2^{21545443434350} is an apocalyptic number.

21545443434350 is an abundant number, since it is smaller than the sum of its proper divisors (26738320206994).

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

21545443434350 is a wasteful number, since it uses less digits than its factorization.

21545443434350 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4732 (or 4727 counting only the distinct ones).

The product of its (nonzero) digits is 6912000, while the sum is 47.

Adding to 21545443434350 its reverse (5343434454512), we get a palindrome (26888877888862).

The spelling of 21545443434350 in words is "twenty-one trillion, five hundred forty-five billion, four hundred forty-three million, four hundred thirty-four thousand, three hundred fifty".