20506766600 has 96 divisors (see below), whose sum is σ = 49306368000. Its totient is φ = 7923571200.

The previous prime is 20506766543. The next prime is 20506766617. The reversal of 20506766600 is 666760502.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3760676 + ... + 3766124.

It is an arithmetic number, because the mean of its divisors is an integer number (513608000).

Almost surely, 2^20506766600 is an apocalyptic number.

20506766600 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 20506766600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24653184000).

20506766600 is an abundant number, since it is smaller than the sum of its proper divisors (28799601400).

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

20506766600 is a wasteful number, since it uses less digits than its factorization.

20506766600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6103 (or 6094 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 38.

The spelling of 20506766600 in words is "twenty billion, five hundred six million, seven hundred sixty-six thousand, six hundred".