20442209663 has 2 divisors, whose sum is σ = 20442209664. Its totient is φ = 20442209662.

The previous prime is 20442209659. The next prime is 20442209693. The reversal of 20442209663 is 36690224402.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20442209663 - 2² = 20442209659 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20442209693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10221104831 + 10221104832.

It is an arithmetic number, because the mean of its divisors is an integer number (10221104832).

Almost surely, 2^20442209663 is an apocalyptic number.

20442209663 is a deficient number, since it is larger than the sum of its proper divisors (1).

20442209663 is an equidigital number, since it uses as much as digits as its factorization.

20442209663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 124416, while the sum is 38.

The spelling of 20442209663 in words is "twenty billion, four hundred forty-two million, two hundred nine thousand, six hundred sixty-three".