20163357 has 8 divisors (see below), whose sum is σ = 29871680. Its totient is φ = 13442220.

The previous prime is 20163331. The next prime is 20163359. The reversal of 20163357 is 75336102.

It is a happy number.

20163357 is a `hidden beast` number, since 20 + 1 + 633 + 5 + 7 = 666.

It is not a de Polignac number, because 20163357 - 2⁷ = 20163229 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 746791 = 20163357 / (2 + 0 + 1 + 6 + 3 + 3 + 5 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20163357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20163359) 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, 373369 + ... + 373422.

It is an arithmetic number, because the mean of its divisors is an integer number (3733960).

Almost surely, 2^20163357 is an apocalyptic number.

20163357 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

20163357 is a deficient number, since it is larger than the sum of its proper divisors (9708323).

20163357 is an equidigital number, since it uses as much as digits as its factorization.

20163357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 746800 (or 746794 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 27.

The square root of 20163357 is about 4490.3626802297. The cubic root of 20163357 is about 272.1787905042.

Adding to 20163357 its reverse (75336102), we get a palindrome (95499459).

The spelling of 20163357 in words is "twenty million, one hundred sixty-three thousand, three hundred fifty-seven".