20858543033 has 2 divisors, whose sum is σ = 20858543034. Its totient is φ = 20858543032.

The previous prime is 20858542981. The next prime is 20858543047. The reversal of 20858543033 is 33034585802.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17749699984 + 3108843049 = 133228^2 + 55757^2 .

It is a cyclic number.

It is not a de Polignac number, because 20858543033 - 2¹² = 20858538937 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (20858543063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10429271516 + 10429271517.

It is an arithmetic number, because the mean of its divisors is an integer number (10429271517).

Almost surely, 2^20858543033 is an apocalyptic number.

It is an amenable number.

20858543033 is a deficient number, since it is larger than the sum of its proper divisors (1).

20858543033 is an equidigital number, since it uses as much as digits as its factorization.

20858543033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345600, while the sum is 41.

The spelling of 20858543033 in words is "twenty billion, eight hundred fifty-eight million, five hundred forty-three thousand, thirty-three".