20655463 has 4 divisors (see below), whose sum is σ = 20904408. Its totient is φ = 20406520.

The previous prime is 20655457. The next prime is 20655469. The reversal of 20655463 is 36455602.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (20655457) and next prime (20655469).

It is a cyclic number.

It is not a de Polignac number, because 20655463 - 2⁹ = 20654951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20655469) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124348 + ... + 124513.

It is an arithmetic number, because the mean of its divisors is an integer number (5226102).

Almost surely, 2^20655463 is an apocalyptic number.

20655463 is a deficient number, since it is larger than the sum of its proper divisors (248945).

20655463 is an equidigital number, since it uses as much as digits as its factorization.

20655463 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248944.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 20655463 is about 4544.8281595678. The cubic root of 20655463 is about 274.3752783036.

The spelling of 20655463 in words is "twenty million, six hundred fifty-five thousand, four hundred sixty-three".