20928062185453 has 4 divisors (see below), whose sum is σ = 20928704005980. Its totient is φ = 20927420364928.

The previous prime is 20928062185427. The next prime is 20928062185501. The reversal of 20928062185453 is 35458126082902.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6057490672809 + 14870571512644 = 2461197^2 + 3856238^2 .

It is a cyclic number.

It is not a de Polignac number, because 20928062185453 - 2⁹ = 20928062184941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20928062185394 and 20928062185403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20928062185403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320861350 + ... + 320926567.

It is an arithmetic number, because the mean of its divisors is an integer number (5232176001495).

Almost surely, 2^{20928062185453} is an apocalyptic number.

It is an amenable number.

20928062185453 is a deficient number, since it is larger than the sum of its proper divisors (641820527).

20928062185453 is an equidigital number, since it uses as much as digits as its factorization.

20928062185453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641820526.

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 20928062185453 in words is "twenty trillion, nine hundred twenty-eight billion, sixty-two million, one hundred eighty-five thousand, four hundred fifty-three".