20357169 has 16 divisors (see below), whose sum is σ = 31088640. Its totient is φ = 11607120.

The previous prime is 20357149. The next prime is 20357171. The reversal of 20357169 is 96175302.

It is not a de Polignac number, because 20357169 - 2¹¹ = 20355121 is a prime.

It is a super-2 number, since 2×20357169² = 828828659389122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20357119) 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, 13104 + ... + 14574.

It is an arithmetic number, because the mean of its divisors is an integer number (1943040).

Almost surely, 2^20357169 is an apocalyptic number.

It is an amenable number.

20357169 is a deficient number, since it is larger than the sum of its proper divisors (10731471).

20357169 is a wasteful number, since it uses less digits than its factorization.

20357169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 20357169 is about 4511.8919534936. The cubic root of 20357169 is about 273.0480801952.

The spelling of 20357169 in words is "twenty million, three hundred fifty-seven thousand, one hundred sixty-nine".