20838543547007 has 2 divisors, whose sum is σ = 20838543547008. Its totient is φ = 20838543547006.

The previous prime is 20838543546959. The next prime is 20838543547033. The reversal of 20838543547007 is 70074534583802.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20838543547007 - 2¹⁶ = 20838543481471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20838543547067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10419271773503 + 10419271773504.

It is an arithmetic number, because the mean of its divisors is an integer number (10419271773504).

Almost surely, 2^{20838543547007} is an apocalyptic number.

20838543547007 is a deficient number, since it is larger than the sum of its proper divisors (1).

20838543547007 is an equidigital number, since it uses as much as digits as its factorization.

20838543547007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22579200, while the sum is 56.

The spelling of 20838543547007 in words is "twenty trillion, eight hundred thirty-eight billion, five hundred forty-three million, five hundred forty-seven thousand, seven".