20769823 has 2 divisors, whose sum is σ = 20769824. Its totient is φ = 20769822.

The previous prime is 20769803. The next prime is 20769857. The reversal of 20769823 is 32896702.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20769823 - 2⁹ = 20769311 is a prime.

It is a super-3 number, since 3×20769823³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20769803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10384911 + 10384912.

It is an arithmetic number, because the mean of its divisors is an integer number (10384912).

Almost surely, 2^20769823 is an apocalyptic number.

20769823 is a deficient number, since it is larger than the sum of its proper divisors (1).

20769823 is an equidigital number, since it uses as much as digits as its factorization.

20769823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 20769823 is about 4557.3921270832. The cubic root of 20769823 is about 274.8807107968.

The spelling of 20769823 in words is "twenty million, seven hundred sixty-nine thousand, eight hundred twenty-three".