21500040542322 has 16 divisors (see below), whose sum is σ = 43000154360640. Its totient is φ = 7166667968112.

The previous prime is 21500040542293. The next prime is 21500040542333. The reversal of 21500040542322 is 22324504000512.

It is a self number, because there is not a number n which added to its sum of digits gives 21500040542322.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1221579 + ... + 6670257.

It is an arithmetic number, because the mean of its divisors is an integer number (2687509647540).

Almost surely, 2^{21500040542322} is an apocalyptic number.

21500040542322 is an abundant number, since it is smaller than the sum of its proper divisors (21500113818318).

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

21500040542322 is a wasteful number, since it uses less digits than its factorization.

21500040542322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6106337.

The product of its (nonzero) digits is 19200, while the sum is 30.

Adding to 21500040542322 its reverse (22324504000512), we get a palindrome (43824544542834).

The spelling of 21500040542322 in words is "twenty-one trillion, five hundred billion, forty million, five hundred forty-two thousand, three hundred twenty-two".