20201938279 has 2 divisors, whose sum is σ = 20201938280. Its totient is φ = 20201938278.

The previous prime is 20201938277. The next prime is 20201938283. The reversal of 20201938279 is 97283910202.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20201938279 - 2¹ = 20201938277 is a prime.

Together with 20201938277, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20201938277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10100969139 + 10100969140.

It is an arithmetic number, because the mean of its divisors is an integer number (10100969140).

Almost surely, 2^20201938279 is an apocalyptic number.

20201938279 is a deficient number, since it is larger than the sum of its proper divisors (1).

20201938279 is an equidigital number, since it uses as much as digits as its factorization.

20201938279 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 43.

The spelling of 20201938279 in words is "twenty billion, two hundred one million, nine hundred thirty-eight thousand, two hundred seventy-nine".