20045542379 has 2 divisors, whose sum is σ = 20045542380. Its totient is φ = 20045542378.

The previous prime is 20045542343. The next prime is 20045542421. The reversal of 20045542379 is 97324554002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20045542379 - 2⁸ = 20045542123 is a prime.

It is not a weakly prime, because it can be changed into another prime (20045542339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10022771189 + 10022771190.

It is an arithmetic number, because the mean of its divisors is an integer number (10022771190).

Almost surely, 2^20045542379 is an apocalyptic number.

20045542379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20045542379 is an equidigital number, since it uses as much as digits as its factorization.

20045542379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 302400, while the sum is 41.

The spelling of 20045542379 in words is "twenty billion, forty-five million, five hundred forty-two thousand, three hundred seventy-nine".