20222877661 has 16 divisors (see below), whose sum is σ = 24396768000. Its totient is φ = 16736166384.

The previous prime is 20222877659. The next prime is 20222877733. The reversal of 20222877661 is 16677822202.

It is not a de Polignac number, because 20222877661 - 2¹ = 20222877659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20222877641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1006585 + ... + 1026478.

It is an arithmetic number, because the mean of its divisors is an integer number (1524798000).

Almost surely, 2^20222877661 is an apocalyptic number.

It is an amenable number.

20222877661 is a deficient number, since it is larger than the sum of its proper divisors (4173890339).

20222877661 is an equidigital number, since it uses as much as digits as its factorization.

20222877661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2033113 (or 2033099 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 20222877661 in words is "twenty billion, two hundred twenty-two million, eight hundred seventy-seven thousand, six hundred sixty-one".