20988033938808 has 16 divisors (see below), whose sum is σ = 52470084847080. Its totient is φ = 6996011312928.

The previous prime is 20988033938803. The next prime is 20988033938869. The reversal of 20988033938808 is 80883933088902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20988033938801) 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, 437250707035 + ... + 437250707082.

Almost surely, 2^{20988033938808} is an apocalyptic number.

It is an amenable number.

20988033938808 is an abundant number, since it is smaller than the sum of its proper divisors (31482050908272).

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

20988033938808 is a wasteful number, since it uses less digits than its factorization.

20988033938808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874501414126 (or 874501414122 counting only the distinct ones).

The product of its (nonzero) digits is 143327232, while the sum is 69.

The spelling of 20988033938808 in words is "twenty trillion, nine hundred eighty-eight billion, thirty-three million, nine hundred thirty-eight thousand, eight hundred eight".