20608463 has 4 divisors (see below), whose sum is σ = 20916120. Its totient is φ = 20300808.

The previous prime is 20608453. The next prime is 20608477. The reversal of 20608463 is 36480602.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36480602 = 2 ⋅18240301.

It is a cyclic number.

It is not a de Polignac number, because 20608463 - 2¹⁰ = 20607439 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 (20608453) 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, 153728 + ... + 153861.

It is an arithmetic number, because the mean of its divisors is an integer number (5229030).

Almost surely, 2^20608463 is an apocalyptic number.

20608463 is a deficient number, since it is larger than the sum of its proper divisors (307657).

20608463 is an equidigital number, since it uses as much as digits as its factorization.

20608463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307656.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 20608463 is about 4539.6545022722. The cubic root of 20608463 is about 274.1670132796.

The spelling of 20608463 in words is "twenty million, six hundred eight thousand, four hundred sixty-three".