20879039 has 2 divisors, whose sum is σ = 20879040. Its totient is φ = 20879038.

The previous prime is 20879029. The next prime is 20879057. The reversal of 20879039 is 93097802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20879039 - 2¹² = 20874943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20878993 and 20879011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20879029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10439519 + 10439520.

It is an arithmetic number, because the mean of its divisors is an integer number (10439520).

Almost surely, 2^20879039 is an apocalyptic number.

20879039 is a deficient number, since it is larger than the sum of its proper divisors (1).

20879039 is an equidigital number, since it uses as much as digits as its factorization.

20879039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 20879039 is about 4569.3587077401. The cubic root of 20879039 is about 275.3616794832.

The spelling of 20879039 in words is "twenty million, eight hundred seventy-nine thousand, thirty-nine".