21530543234134 has 32 divisors (see below), whose sum is σ = 36609157527552. Its totient is φ = 9408192120000.

The previous prime is 21530543234119. The next prime is 21530543234141. The reversal of 21530543234134 is 43143234503512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104432487 + ... + 104638450.

It is an arithmetic number, because the mean of its divisors is an integer number (1144036172736).

Almost surely, 2^{21530543234134} is an apocalyptic number.

21530543234134 is a deficient number, since it is larger than the sum of its proper divisors (15078614293418).

21530543234134 is a wasteful number, since it uses less digits than its factorization.

21530543234134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209071132.

The product of its (nonzero) digits is 518400, while the sum is 40.

Adding to 21530543234134 its reverse (43143234503512), we get a palindrome (64673777737646).

The spelling of 21530543234134 in words is "twenty-one trillion, five hundred thirty billion, five hundred forty-three million, two hundred thirty-four thousand, one hundred thirty-four".