20621122301668 has 24 divisors (see below), whose sum is σ = 41349926725632. Its totient is φ = 8814549103104.

The previous prime is 20621122301651. The next prime is 20621122301707. The reversal of 20621122301668 is 86610322112602.

It is a self number, because there is not a number n which added to its sum of digits gives 20621122301668.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 961436605 + ... + 961458052.

It is an arithmetic number, because the mean of its divisors is an integer number (1722913613568).

Almost surely, 2^{20621122301668} is an apocalyptic number.

20621122301668 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

20621122301668 is an abundant number, since it is smaller than the sum of its proper divisors (20728804423964).

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

20621122301668 is a wasteful number, since it uses less digits than its factorization.

20621122301668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1922895051 (or 1922895049 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 20621122301668 in words is "twenty trillion, six hundred twenty-one billion, one hundred twenty-two million, three hundred one thousand, six hundred sixty-eight".