20604767 has 2 divisors, whose sum is σ = 20604768. Its totient is φ = 20604766.

The previous prime is 20604743. The next prime is 20604781. The reversal of 20604767 is 76740602.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20604767 - 2²⁰ = 19556191 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 (20606767) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10302383 + 10302384.

It is an arithmetic number, because the mean of its divisors is an integer number (10302384).

Almost surely, 2^20604767 is an apocalyptic number.

20604767 is a deficient number, since it is larger than the sum of its proper divisors (1).

20604767 is an equidigital number, since it uses as much as digits as its factorization.

20604767 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 32.

The square root of 20604767 is about 4539.2474045815. The cubic root of 20604767 is about 274.1506222486.

The spelling of 20604767 in words is "twenty million, six hundred four thousand, seven hundred sixty-seven".