20106542279 has 2 divisors, whose sum is σ = 20106542280. Its totient is φ = 20106542278.

The previous prime is 20106542263. The next prime is 20106542333. The reversal of 20106542279 is 97224560102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20106542279 - 2⁴ = 20106542263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20106542219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10053271139 + 10053271140.

It is an arithmetic number, because the mean of its divisors is an integer number (10053271140).

Almost surely, 2^20106542279 is an apocalyptic number.

20106542279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20106542279 is an equidigital number, since it uses as much as digits as its factorization.

20106542279 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 20106542279 in words is "twenty billion, one hundred six million, five hundred forty-two thousand, two hundred seventy-nine".