20366888720 has 20 divisors (see below), whose sum is σ = 47353016460. Its totient is φ = 8146755456.

The previous prime is 20366888713. The next prime is 20366888749. The reversal of 20366888720 is 2788866302.

It can be written as a sum of positive squares in 2 ways, for example, as 5573518336 + 14793370384 = 74656^2 + 121628^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×20366888720³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127292975 + ... + 127293134.

It is an arithmetic number, because the mean of its divisors is an integer number (2367650823).

Almost surely, 2^20366888720 is an apocalyptic number.

20366888720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20366888720 is an abundant number, since it is smaller than the sum of its proper divisors (26986127740).

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

20366888720 is a wasteful number, since it uses less digits than its factorization.

20366888720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 254586122 (or 254586116 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 50.

The spelling of 20366888720 in words is "twenty billion, three hundred sixty-six million, eight hundred eighty-eight thousand, seven hundred twenty".