20163351 has 16 divisors (see below), whose sum is σ = 30477440. Its totient is φ = 11754720.

The previous prime is 20163331. The next prime is 20163359. The reversal of 20163351 is 15336102.

It is not a de Polignac number, because 20163351 - 2⁶ = 20163287 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 (20163359) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12865 + ... + 14346.

It is an arithmetic number, because the mean of its divisors is an integer number (1904840).

Almost surely, 2^20163351 is an apocalyptic number.

20163351 is a deficient number, since it is larger than the sum of its proper divisors (10314089).

20163351 is a wasteful number, since it uses less digits than its factorization.

20163351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27246.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 20163351 is about 4490.3620121322. The cubic root of 20163351 is about 272.1787635068.

Adding to 20163351 its reverse (15336102), we get a palindrome (35499453).

The spelling of 20163351 in words is "twenty million, one hundred sixty-three thousand, three hundred fifty-one".