20604743 has 2 divisors, whose sum is σ = 20604744. Its totient is φ = 20604742.

The previous prime is 20604719. The next prime is 20604767. The reversal of 20604743 is 34740602.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (20604719) and next prime (20604767).

It is a cyclic number.

It is not a de Polignac number, because 20604743 - 2⁶ = 20604679 is a prime.

It is equal to p_1306493 and since 20604743 and 1306493 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20604713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10302371 + 10302372.

It is an arithmetic number, because the mean of its divisors is an integer number (10302372).

Almost surely, 2^20604743 is an apocalyptic number.

20604743 is a deficient number, since it is larger than the sum of its proper divisors (1).

20604743 is an equidigital number, since it uses as much as digits as its factorization.

20604743 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4032, while the sum is 26.

The square root of 20604743 is about 4539.2447609707. The cubic root of 20604743 is about 274.1505158070.

The spelling of 20604743 in words is "twenty million, six hundred four thousand, seven hundred forty-three".