20854848907 has 2 divisors, whose sum is σ = 20854848908. Its totient is φ = 20854848906.

The previous prime is 20854848827. The next prime is 20854848947. The reversal of 20854848907 is 70984845802.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20854848907 is a prime.

It is not a weakly prime, because it can be changed into another prime (20854848947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10427424453 + 10427424454.

It is an arithmetic number, because the mean of its divisors is an integer number (10427424454).

Almost surely, 2^20854848907 is an apocalyptic number.

20854848907 is a deficient number, since it is larger than the sum of its proper divisors (1).

20854848907 is an equidigital number, since it uses as much as digits as its factorization.

20854848907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5160960, while the sum is 55.

The spelling of 20854848907 in words is "twenty billion, eight hundred fifty-four million, eight hundred forty-eight thousand, nine hundred seven".