20020553616 has 80 divisors (see below), whose sum is σ = 59181989888. Its totient is φ = 5713027200.

The previous prime is 20020553563. The next prime is 20020553629. The reversal of 20020553616 is 61635502002.

It is a super-2 number, since 2×20020553616² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235761 + ... + 309231.

Almost surely, 2^20020553616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20020553616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29590994944).

20020553616 is an abundant number, since it is smaller than the sum of its proper divisors (39161436272).

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

20020553616 is a wasteful number, since it uses less digits than its factorization.

20020553616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74300 (or 74294 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The spelling of 20020553616 in words is "twenty billion, twenty million, five hundred fifty-three thousand, six hundred sixteen".