21087622222437 has 16 divisors (see below), whose sum is σ = 28535394467520. Its totient is φ = 13850272900992.

The previous prime is 21087622222367. The next prime is 21087622222439. The reversal of 21087622222437 is 73422222678012.

It is not a de Polignac number, because 21087622222437 - 2³¹ = 21085474738789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21087622222439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142488963 + ... + 142636880.

It is an arithmetic number, because the mean of its divisors is an integer number (1783462154220).

Almost surely, 2^{21087622222437} is an apocalyptic number.

It is an amenable number.

21087622222437 is a deficient number, since it is larger than the sum of its proper divisors (7447772245083).

21087622222437 is a wasteful number, since it uses less digits than its factorization.

21087622222437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285126212.

The product of its (nonzero) digits is 1806336, while the sum is 48.

The spelling of 21087622222437 in words is "twenty-one trillion, eighty-seven billion, six hundred twenty-two million, two hundred twenty-two thousand, four hundred thirty-seven".