21022888622 has 4 divisors (see below), whose sum is σ = 31534332936. Its totient is φ = 10511444310.

The previous prime is 21022888609. The next prime is 21022888643. The reversal of 21022888622 is 22688822012.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 21022888622.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5255722154 + ... + 5255722157.

It is an arithmetic number, because the mean of its divisors is an integer number (7883583234).

Almost surely, 2^21022888622 is an apocalyptic number.

21022888622 is a deficient number, since it is larger than the sum of its proper divisors (10511444314).

21022888622 is a wasteful number, since it uses less digits than its factorization.

21022888622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10511444313.

The product of its (nonzero) digits is 98304, while the sum is 41.

The spelling of 21022888622 in words is "twenty-one billion, twenty-two million, eight hundred eighty-eight thousand, six hundred twenty-two".