21026822968 has 8 divisors (see below), whose sum is σ = 39425293080. Its totient is φ = 10513411480.

The previous prime is 21026822951. The next prime is 21026823023. The reversal of 21026822968 is 86922862012.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×21026822968² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

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, 1314176428 + ... + 1314176443.

It is an arithmetic number, because the mean of its divisors is an integer number (4928161635).

Almost surely, 2^21026822968 is an apocalyptic number.

It is an amenable number.

21026822968 is a deficient number, since it is larger than the sum of its proper divisors (18398470112).

21026822968 is a wasteful number, since it uses less digits than its factorization.

21026822968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2628352877 (or 2628352873 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 21026822968 in words is "twenty-one billion, twenty-six million, eight hundred twenty-two thousand, nine hundred sixty-eight".