20630123879 has 2 divisors, whose sum is σ = 20630123880. Its totient is φ = 20630123878.

The previous prime is 20630123863. The next prime is 20630123897. The reversal of 20630123879 is 97832103602.

Together with next prime (20630123897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20630123879 - 2⁴ = 20630123863 is a prime.

It is a super-2 number, since 2×20630123879² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20630123809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10315061939 + 10315061940.

It is an arithmetic number, because the mean of its divisors is an integer number (10315061940).

Almost surely, 2^20630123879 is an apocalyptic number.

20630123879 is a deficient number, since it is larger than the sum of its proper divisors (1).

20630123879 is an equidigital number, since it uses as much as digits as its factorization.

20630123879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 41.

The spelling of 20630123879 in words is "twenty billion, six hundred thirty million, one hundred twenty-three thousand, eight hundred seventy-nine".