20927289600 has 1080 divisors, whose sum is σ = 90777800960. Its totient is φ = 4658135040.

The previous prime is 20927289599. The next prime is 20927289601. The reversal of 20927289600 is 698272902.

It is an interprime number because it is at equal distance from previous prime (20927289599) and next prime (20927289601).

It is a tau number, because it is divible by the number of its divisors (1080).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (20927289601) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 264902361 + ... + 264902439.

Almost surely, 2^20927289600 is an apocalyptic number.

20927289600 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 20927289600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45388900480).

20927289600 is an abundant number, since it is smaller than the sum of its proper divisors (69850511360).

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

20927289600 is an equidigital number, since it uses as much as digits as its factorization.

20927289600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 169 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 20927289600 in words is "twenty billion, nine hundred twenty-seven million, two hundred eighty-nine thousand, six hundred".