20920379 has 2 divisors, whose sum is σ = 20920380. Its totient is φ = 20920378.

The previous prime is 20920369. The next prime is 20920391. The reversal of 20920379 is 97302902.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20920379 - 2¹⁶ = 20854843 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20920369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10460189 + 10460190.

It is an arithmetic number, because the mean of its divisors is an integer number (10460190).

Almost surely, 2^20920379 is an apocalyptic number.

20920379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20920379 is an equidigital number, since it uses as much as digits as its factorization.

20920379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 32.

The square root of 20920379 is about 4573.8800815063. The cubic root of 20920379 is about 275.5432961929.

The spelling of 20920379 in words is "twenty million, nine hundred twenty thousand, three hundred seventy-nine".