20073563 has 2 divisors, whose sum is σ = 20073564. Its totient is φ = 20073562.

The previous prime is 20073541. The next prime is 20073577. The reversal of 20073563 is 36537002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20073563 - 2²⁰ = 19024987 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20073533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10036781 + 10036782.

It is an arithmetic number, because the mean of its divisors is an integer number (10036782).

Almost surely, 2^20073563 is an apocalyptic number.

20073563 is a deficient number, since it is larger than the sum of its proper divisors (1).

20073563 is an equidigital number, since it uses as much as digits as its factorization.

20073563 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 20073563 is about 4480.3529994856. The cubic root of 20073563 is about 271.7741556322.

It can be divided in two parts, 200 and 73563, that multiplied together give a triangular number (14712600 = T₅₄₂₄).

The spelling of 20073563 in words is "twenty million, seventy-three thousand, five hundred sixty-three".