20396663 has 8 divisors (see below), whose sum is σ = 23852928. Its totient is φ = 17076024.

The previous prime is 20396591. The next prime is 20396681. The reversal of 20396663 is 36669302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20396663 - 2¹⁶ = 20331127 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 (20396683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33581 + ... + 34182.

It is an arithmetic number, because the mean of its divisors is an integer number (2981616).

Almost surely, 2^20396663 is an apocalyptic number.

20396663 is a deficient number, since it is larger than the sum of its proper divisors (3456265).

20396663 is an equidigital number, since it uses as much as digits as its factorization.

20396663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67813.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 20396663 is about 4516.2664890372. The cubic root of 20396663 is about 273.2245421039.

The spelling of 20396663 in words is "twenty million, three hundred ninety-six thousand, six hundred sixty-three".