20908626863 has 2 divisors, whose sum is σ = 20908626864. Its totient is φ = 20908626862.

The previous prime is 20908626853. The next prime is 20908626883. The reversal of 20908626863 is 36862680902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20908626863 - 2¹⁴ = 20908610479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20908626803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10454313431 + 10454313432.

It is an arithmetic number, because the mean of its divisors is an integer number (10454313432).

Almost surely, 2^20908626863 is an apocalyptic number.

20908626863 is a deficient number, since it is larger than the sum of its proper divisors (1).

20908626863 is an equidigital number, since it uses as much as digits as its factorization.

20908626863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 20908626863 in words is "twenty billion, nine hundred eight million, six hundred twenty-six thousand, eight hundred sixty-three".