20350231 has 4 divisors (see below), whose sum is σ = 22200264. Its totient is φ = 18500200.

The previous prime is 20350217. The next prime is 20350243. The reversal of 20350231 is 13205302.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20350231 - 2¹³ = 20342039 is a prime.

It is a super-2 number, since 2×20350231² = 828263803506722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20350261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 925000 + ... + 925021.

It is an arithmetic number, because the mean of its divisors is an integer number (5550066).

Almost surely, 2^20350231 is an apocalyptic number.

20350231 is a deficient number, since it is larger than the sum of its proper divisors (1850033).

20350231 is a wasteful number, since it uses less digits than its factorization.

20350231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1850032.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 20350231 is about 4511.1230309093. The cubic root of 20350231 is about 273.0170571711.

Adding to 20350231 its reverse (13205302), we get a palindrome (33555533).

Subtracting from 20350231 its reverse (13205302), we obtain a square (7144929 = 2673²).

The spelling of 20350231 in words is "twenty million, three hundred fifty thousand, two hundred thirty-one".