20935255921920 has 144 divisors (see below), whose sum is σ = 74291081901120. Its totient is φ = 5582734903296.

The previous prime is 20935255921891. The next prime is 20935255921949. The reversal of 20935255921920 is 2912955253902.

20935255921920 is a `hidden beast` number, since 2 + 0 + 9 + 3 + 5 + 25 + 592 + 1 + 9 + 20 = 666.

It is an interprime number because it is at equal distance from previous prime (20935255921891) and next prime (20935255921949).

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 302848194 + ... + 302917313.

It is an arithmetic number, because the mean of its divisors is an integer number (515910290980).

Almost surely, 2^{20935255921920} is an apocalyptic number.

20935255921920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20935255921920 is an abundant number, since it is smaller than the sum of its proper divisors (53355825979200).

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

20935255921920 is an equidigital number, since it uses as much as digits as its factorization.

20935255921920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605765537 (or 605765517 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 54.

The spelling of 20935255921920 in words is "twenty trillion, nine hundred thirty-five billion, two hundred fifty-five million, nine hundred twenty-one thousand, nine hundred twenty".