20368663 has 6 divisors (see below), whose sum is σ = 23694216. Its totient is φ = 17458812.

The previous prime is 20368661. The next prime is 20368723. The reversal of 20368663 is 36686302.

It is not a de Polignac number, because 20368663 - 2¹ = 20368661 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20368661) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 207795 + ... + 207892.

It is an arithmetic number, because the mean of its divisors is an integer number (3949036).

Almost surely, 2^20368663 is an apocalyptic number.

20368663 is a deficient number, since it is larger than the sum of its proper divisors (3325553).

20368663 is an equidigital number, since it uses as much as digits as its factorization.

20368663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415701 (or 415694 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 34.

The square root of 20368663 is about 4513.1655187906. The cubic root of 20368663 is about 273.0994597060.

The spelling of 20368663 in words is "twenty million, three hundred sixty-eight thousand, six hundred sixty-three".