20435573 has 2 divisors, whose sum is σ = 20435574. Its totient is φ = 20435572.

The previous prime is 20435563. The next prime is 20435579. The reversal of 20435573 is 37553402.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14569489 + 5866084 = 3817^2 + 2422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20435573 is a prime.

It is a super-2 number, since 2×20435573² = 835225287676658, which contains 22 as substring.

It is equal to p_1296434 and since 20435573 and 1296434 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 (20435579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10217786 + 10217787.

It is an arithmetic number, because the mean of its divisors is an integer number (10217787).

Almost surely, 2^20435573 is an apocalyptic number.

It is an amenable number.

20435573 is a deficient number, since it is larger than the sum of its proper divisors (1).

20435573 is an equidigital number, since it uses as much as digits as its factorization.

20435573 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 29.

The square root of 20435573 is about 4520.5721982953. The cubic root of 20435573 is about 273.3981720396.

Adding to 20435573 its reverse (37553402), we get a palindrome (57988975).

The spelling of 20435573 in words is "twenty million, four hundred thirty-five thousand, five hundred seventy-three".