20536463 has 4 divisors (see below), whose sum is σ = 20627160. Its totient is φ = 20445768.

The previous prime is 20536457. The next prime is 20536471. The reversal of 20536463 is 36463502.

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

It is a cyclic number.

It is not a de Polignac number, because 20536463 - 2¹² = 20532367 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 (20536063) 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, 45008 + ... + 45461.

It is an arithmetic number, because the mean of its divisors is an integer number (5156790).

Almost surely, 2^20536463 is an apocalyptic number.

20536463 is a deficient number, since it is larger than the sum of its proper divisors (90697).

20536463 is an equidigital number, since it uses as much as digits as its factorization.

20536463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90696.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 20536463 is about 4531.7174448547. The cubic root of 20536463 is about 273.8473540159.

Adding to 20536463 its reverse (36463502), we get a palindrome (56999965).

The spelling of 20536463 in words is "twenty million, five hundred thirty-six thousand, four hundred sixty-three".