20877079 has 2 divisors, whose sum is σ = 20877080. Its totient is φ = 20877078.

The previous prime is 20877061. The next prime is 20877113. The reversal of 20877079 is 97077802.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20877079 - 2⁵ = 20877047 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20877679) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10438539 + 10438540.

It is an arithmetic number, because the mean of its divisors is an integer number (10438540).

Almost surely, 2^20877079 is an apocalyptic number.

20877079 is a deficient number, since it is larger than the sum of its proper divisors (1).

20877079 is an equidigital number, since it uses as much as digits as its factorization.

20877079 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 20877079 is about 4569.1442305972. The cubic root of 20877079 is about 275.3530627746.

It can be divided in two parts, 208770 and 79, that added together give a square (208849 = 457²).

The spelling of 20877079 in words is "twenty million, eight hundred seventy-seven thousand, seventy-nine".