21500104224543 has 32 divisors (see below), whose sum is σ = 32982765196800. Its totient is φ = 12203014849920.

The previous prime is 21500104224541. The next prime is 21500104224559. The reversal of 21500104224543 is 34542240100512.

It is not a de Polignac number, because 21500104224543 - 2¹ = 21500104224541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21500104224541) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 200737521 + ... + 200844597.

It is an arithmetic number, because the mean of its divisors is an integer number (1030711412400).

Almost surely, 2^{21500104224543} is an apocalyptic number.

21500104224543 is a deficient number, since it is larger than the sum of its proper divisors (11482660972257).

21500104224543 is a wasteful number, since it uses less digits than its factorization.

21500104224543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171407.

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 21500104224543 in words is "twenty-one trillion, five hundred billion, one hundred four million, two hundred twenty-four thousand, five hundred forty-three".