20555535000 has 960 divisors, whose sum is σ = 88612634880. Its totient is φ = 3836160000.

The previous prime is 20555534977. The next prime is 20555535019. The reversal of 20555535000 is 53555502.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 555554982 + ... + 555555018.

It is an arithmetic number, because the mean of its divisors is an integer number (92304828).

Almost surely, 2^20555535000 is an apocalyptic number.

20555535000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20555535000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44306317440).

20555535000 is an abundant number, since it is smaller than the sum of its proper divisors (68057099880).

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

20555535000 is a wasteful number, since it uses less digits than its factorization.

20555535000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 30.

It can be divided in two parts, 20555 and 535000, that added together give a palindrome (555555).

The spelling of 20555535000 in words is "twenty billion, five hundred fifty-five million, five hundred thirty-five thousand".