20828453613 has 16 divisors (see below), whose sum is σ = 30595897152. Its totient is φ = 12498320000.

The previous prime is 20828453609. The next prime is 20828453647. The reversal of 20828453613 is 31635482802.

It is a cyclic number.

It is not a de Polignac number, because 20828453613 - 2² = 20828453609 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20828453603) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3121248 + ... + 3127913.

It is an arithmetic number, because the mean of its divisors is an integer number (1912243572).

Almost surely, 2^20828453613 is an apocalyptic number.

It is an amenable number.

20828453613 is a deficient number, since it is larger than the sum of its proper divisors (9767443539).

20828453613 is a wasteful number, since it uses less digits than its factorization.

20828453613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6249276.

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 20828453613 in words is "twenty billion, eight hundred twenty-eight million, four hundred fifty-three thousand, six hundred thirteen".