20643010079 has 2 divisors, whose sum is σ = 20643010080. Its totient is φ = 20643010078.

The previous prime is 20643010051. The next prime is 20643010097. The reversal of 20643010079 is 97001034602.

Together with next prime (20643010097) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20643010079 - 2¹² = 20643005983 is a prime.

It is a super-2 number, since 2×20643010079² (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 (20643010039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10321505039 + 10321505040.

It is an arithmetic number, because the mean of its divisors is an integer number (10321505040).

Almost surely, 2^20643010079 is an apocalyptic number.

20643010079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20643010079 is an equidigital number, since it uses as much as digits as its factorization.

20643010079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9072, while the sum is 32.

The spelling of 20643010079 in words is "twenty billion, six hundred forty-three million, ten thousand, seventy-nine".