20502379 has 2 divisors, whose sum is σ = 20502380. Its totient is φ = 20502378.

The previous prime is 20502367. The next prime is 20502389. The reversal of 20502379 is 97320502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20502379 - 2⁵ = 20502347 is a prime.

It is not a weakly prime, because it can be changed into another prime (20502319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10251189 + 10251190.

It is an arithmetic number, because the mean of its divisors is an integer number (10251190).

Almost surely, 2^20502379 is an apocalyptic number.

20502379 is a deficient number, since it is larger than the sum of its proper divisors (1).

20502379 is an equidigital number, since it uses as much as digits as its factorization.

20502379 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 20502379 is about 4527.9552780477. The cubic root of 20502379 is about 273.6957702744.

The spelling of 20502379 in words is "twenty million, five hundred two thousand, three hundred seventy-nine".