20228300661 has 16 divisors (see below), whose sum is σ = 27908697600. Its totient is φ = 13016971968.

The previous prime is 20228300639. The next prime is 20228300669. The reversal of 20228300661 is 16600382202.

It is not a de Polignac number, because 20228300661 - 2⁹ = 20228300149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20228300669) 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, 311100 + ... + 370458.

It is an arithmetic number, because the mean of its divisors is an integer number (1744293600).

Almost surely, 2^20228300661 is an apocalyptic number.

It is an amenable number.

20228300661 is a deficient number, since it is larger than the sum of its proper divisors (7680396939).

20228300661 is a wasteful number, since it uses less digits than its factorization.

20228300661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63308.

The product of its (nonzero) digits is 6912, while the sum is 30.

Adding to 20228300661 its reverse (16600382202), we get a palindrome (36828682863).

The spelling of 20228300661 in words is "twenty billion, two hundred twenty-eight million, three hundred thousand, six hundred sixty-one".