20606671828 has 12 divisors (see below), whose sum is σ = 36077391252. Its totient is φ = 10298845760.

The previous prime is 20606671823. The next prime is 20606671867. The reversal of 20606671828 is 82817660602.

It can be written as a sum of positive squares in 2 ways, for example, as 4038348304 + 16568323524 = 63548^2 + 128718^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20606671823) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1112203 + ... + 1130578.

It is an arithmetic number, because the mean of its divisors is an integer number (3006449271).

Almost surely, 2^20606671828 is an apocalyptic number.

It is an amenable number.

20606671828 is a deficient number, since it is larger than the sum of its proper divisors (15470719424).

20606671828 is a wasteful number, since it uses less digits than its factorization.

20606671828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2245082 (or 2245080 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 20606671828 in words is "twenty billion, six hundred six million, six hundred seventy-one thousand, eight hundred twenty-eight".