21534343454150 has 48 divisors (see below), whose sum is σ = 40071750431328. Its totient is φ = 8609895072000.

The previous prime is 21534343454111. The next prime is 21534343454159. The reversal of 21534343454150 is 5145434343512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21534343454159) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1376780330 + ... + 1376795970.

It is an arithmetic number, because the mean of its divisors is an integer number (834828133986).

Almost surely, 2^{21534343454150} is an apocalyptic number.

21534343454150 is a deficient number, since it is larger than the sum of its proper divisors (18537406977178).

21534343454150 is a wasteful number, since it uses less digits than its factorization.

21534343454150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26177 (or 26172 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 44.

Adding to 21534343454150 its reverse (5145434343512), we get a palindrome (26679777797662).

The spelling of 21534343454150 in words is "twenty-one trillion, five hundred thirty-four billion, three hundred forty-three million, four hundred fifty-four thousand, one hundred fifty".