20213456833 has 2 divisors, whose sum is σ = 20213456834. Its totient is φ = 20213456832.

The previous prime is 20213456821. The next prime is 20213456849. The reversal of 20213456833 is 33865431202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19207742464 + 1005714369 = 138592^2 + 31713^2 .

It is a cyclic number.

It is not a de Polignac number, because 20213456833 - 2⁵ = 20213456801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20213456792 and 20213456801.

It is not a weakly prime, because it can be changed into another prime (20213456233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10106728416 + 10106728417.

It is an arithmetic number, because the mean of its divisors is an integer number (10106728417).

Almost surely, 2^20213456833 is an apocalyptic number.

It is an amenable number.

20213456833 is a deficient number, since it is larger than the sum of its proper divisors (1).

20213456833 is an equidigital number, since it uses as much as digits as its factorization.

20213456833 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 37.

The spelling of 20213456833 in words is "twenty billion, two hundred thirteen million, four hundred fifty-six thousand, eight hundred thirty-three".