20767423 has 2 divisors, whose sum is σ = 20767424. Its totient is φ = 20767422.

The previous prime is 20767339. The next prime is 20767447. The reversal of 20767423 is 32476702.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20767423 - 2¹³ = 20759231 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20767223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10383711 + 10383712.

It is an arithmetic number, because the mean of its divisors is an integer number (10383712).

Almost surely, 2^20767423 is an apocalyptic number.

20767423 is a deficient number, since it is larger than the sum of its proper divisors (1).

20767423 is an equidigital number, since it uses as much as digits as its factorization.

20767423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14112, while the sum is 31.

The square root of 20767423 is about 4557.1288109949. The cubic root of 20767423 is about 274.8701226931.

The spelling of 20767423 in words is "twenty million, seven hundred sixty-seven thousand, four hundred twenty-three".