20672438063 has 2 divisors, whose sum is σ = 20672438064. Its totient is φ = 20672438062.

The previous prime is 20672438051. The next prime is 20672438117. The reversal of 20672438063 is 36083427602.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20672438063 - 2¹⁰ = 20672437039 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20672438063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20672438863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10336219031 + 10336219032.

It is an arithmetic number, because the mean of its divisors is an integer number (10336219032).

Almost surely, 2^20672438063 is an apocalyptic number.

20672438063 is a deficient number, since it is larger than the sum of its proper divisors (1).

20672438063 is an equidigital number, since it uses as much as digits as its factorization.

20672438063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 41.

The spelling of 20672438063 in words is "twenty billion, six hundred seventy-two million, four hundred thirty-eight thousand, sixty-three".