20220997345660 has 48 divisors (see below), whose sum is σ = 43929400485600. Its totient is φ = 7809306063104.

The previous prime is 20220997345639. The next prime is 20220997345721. The reversal of 20220997345660 is 6654379902202.

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 in 15 ways as a sum of consecutive naturals, for example, 25885071 + ... + 26654809.

It is an arithmetic number, because the mean of its divisors is an integer number (915195843450).

Almost surely, 2^{20220997345660} is an apocalyptic number.

20220997345660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20220997345660 is an abundant number, since it is smaller than the sum of its proper divisors (23708403139940).

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

20220997345660 is a wasteful number, since it uses less digits than its factorization.

20220997345660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 815070 (or 815068 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 55.

The spelling of 20220997345660 in words is "twenty trillion, two hundred twenty billion, nine hundred ninety-seven million, three hundred forty-five thousand, six hundred sixty".