20547463 has 2 divisors, whose sum is σ = 20547464. Its totient is φ = 20547462.

The previous prime is 20547433. The next prime is 20547467. The reversal of 20547463 is 36474502.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20547463 - 2⁵ = 20547431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20547467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10273731 + 10273732.

It is an arithmetic number, because the mean of its divisors is an integer number (10273732).

Almost surely, 2^20547463 is an apocalyptic number.

20547463 is a deficient number, since it is larger than the sum of its proper divisors (1).

20547463 is an equidigital number, since it uses as much as digits as its factorization.

20547463 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 31.

The square root of 20547463 is about 4532.9309502793. The cubic root of 20547463 is about 273.8962391497.

The spelling of 20547463 in words is "twenty million, five hundred forty-seven thousand, four hundred sixty-three".