20572663 has 2 divisors, whose sum is σ = 20572664. Its totient is φ = 20572662.

The previous prime is 20572661. The next prime is 20572691. The reversal of 20572663 is 36627502.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20572663 - 2¹ = 20572661 is a prime.

Together with 20572661, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20572661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10286331 + 10286332.

It is an arithmetic number, because the mean of its divisors is an integer number (10286332).

Almost surely, 2^20572663 is an apocalyptic number.

20572663 is a deficient number, since it is larger than the sum of its proper divisors (1).

20572663 is an equidigital number, since it uses as much as digits as its factorization.

20572663 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 31.

The square root of 20572663 is about 4535.7097570281. The cubic root of 20572663 is about 274.0081648161.

The spelling of 20572663 in words is "twenty million, five hundred seventy-two thousand, six hundred sixty-three".