20668903038 has 96 divisors (see below), whose sum is σ = 53998214400. Its totient is φ = 5581675008.

The previous prime is 20668903007. The next prime is 20668903043. The reversal of 20668903038 is 83030986602.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20668902984 and 20668903002.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1050798 + ... + 1070286.

It is an arithmetic number, because the mean of its divisors is an integer number (562481400).

Almost surely, 2^20668903038 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20668903038, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26999107200).

20668903038 is an abundant number, since it is smaller than the sum of its proper divisors (33329311362).

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

20668903038 is a wasteful number, since it uses less digits than its factorization.

20668903038 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19966 (or 19963 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The spelling of 20668903038 in words is "twenty billion, six hundred sixty-eight million, nine hundred three thousand, thirty-eight".