20516366700 has 216 divisors, whose sum is σ = 68207853168. Its totient is φ = 5140316160.

The previous prime is 20516366677. The next prime is 20516366729. The reversal of 20516366700 is 766361502.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 17640319 + ... + 17641481.

It is an arithmetic number, because the mean of its divisors is an integer number (315777098).

Almost surely, 2^20516366700 is an apocalyptic number.

20516366700 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 20516366700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34103926584).

20516366700 is an abundant number, since it is smaller than the sum of its proper divisors (47691486468).

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

20516366700 is a wasteful number, since it uses less digits than its factorization.

20516366700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2353 (or 2343 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 36.

The spelling of 20516366700 in words is "twenty billion, five hundred sixteen million, three hundred sixty-six thousand, seven hundred".