20858733851 has 2 divisors, whose sum is σ = 20858733852. Its totient is φ = 20858733850.

The previous prime is 20858733761. The next prime is 20858733871. The reversal of 20858733851 is 15833785802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20858733851 - 2¹⁰ = 20858732827 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20858733851.

It is not a weakly prime, because it can be changed into another prime (20858733871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10429366925 + 10429366926.

It is an arithmetic number, because the mean of its divisors is an integer number (10429366926).

Almost surely, 2^20858733851 is an apocalyptic number.

20858733851 is a deficient number, since it is larger than the sum of its proper divisors (1).

20858733851 is an equidigital number, since it uses as much as digits as its factorization.

20858733851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1612800, while the sum is 50.

The spelling of 20858733851 in words is "twenty billion, eight hundred fifty-eight million, seven hundred thirty-three thousand, eight hundred fifty-one".