20755298208 has 24 divisors (see below), whose sum is σ = 54482658048. Its totient is φ = 6918432704.

The previous prime is 20755298197. The next prime is 20755298237. The reversal of 20755298208 is 80289255702.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×20755298208² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108100416 + ... + 108100607.

It is an arithmetic number, because the mean of its divisors is an integer number (2270110752).

Almost surely, 2^20755298208 is an apocalyptic number.

It is an amenable number.

20755298208 is an abundant number, since it is smaller than the sum of its proper divisors (33727359840).

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

20755298208 is a wasteful number, since it uses less digits than its factorization.

20755298208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216201036 (or 216201028 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 48.

The spelling of 20755298208 in words is "twenty billion, seven hundred fifty-five million, two hundred ninety-eight thousand, two hundred eight".