20777023 has 2 divisors, whose sum is σ = 20777024. Its totient is φ = 20777022.

The previous prime is 20776997. The next prime is 20777039. The reversal of 20777023 is 32077702.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20777023 - 2⁵ = 20776991 is a prime.

It is a super-3 number, since 3×20777023³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20776982 and 20777000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20777063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10388511 + 10388512.

It is an arithmetic number, because the mean of its divisors is an integer number (10388512).

Almost surely, 2^20777023 is an apocalyptic number.

20777023 is a deficient number, since it is larger than the sum of its proper divisors (1).

20777023 is an equidigital number, since it uses as much as digits as its factorization.

20777023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4116, while the sum is 28.

The square root of 20777023 is about 4558.1819840809. The cubic root of 20777023 is about 274.9124702147.

The spelling of 20777023 in words is "twenty million, seven hundred seventy-seven thousand, twenty-three".