20649303863 has 2 divisors, whose sum is σ = 20649303864. Its totient is φ = 20649303862.

The previous prime is 20649303833. The next prime is 20649303889. The reversal of 20649303863 is 36830394602.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20649303863 - 2²⁸ = 20380868407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20649303833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10324651931 + 10324651932.

It is an arithmetic number, because the mean of its divisors is an integer number (10324651932).

Almost surely, 2^20649303863 is an apocalyptic number.

20649303863 is a deficient number, since it is larger than the sum of its proper divisors (1).

20649303863 is an equidigital number, since it uses as much as digits as its factorization.

20649303863 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 44.

The spelling of 20649303863 in words is "twenty billion, six hundred forty-nine million, three hundred three thousand, eight hundred sixty-three".