20812541807 has 2 divisors, whose sum is σ = 20812541808. Its totient is φ = 20812541806.

The previous prime is 20812541753. The next prime is 20812541831. The reversal of 20812541807 is 70814521802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20812541807 - 2¹⁴ = 20812525423 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20812541837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10406270903 + 10406270904.

It is an arithmetic number, because the mean of its divisors is an integer number (10406270904).

Almost surely, 2^20812541807 is an apocalyptic number.

20812541807 is a deficient number, since it is larger than the sum of its proper divisors (1).

20812541807 is an equidigital number, since it uses as much as digits as its factorization.

20812541807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35840, while the sum is 38.

The spelling of 20812541807 in words is "twenty billion, eight hundred twelve million, five hundred forty-one thousand, eight hundred seven".