20243351 has 4 divisors (see below), whose sum is σ = 20268600. Its totient is φ = 20218104.

The previous prime is 20243347. The next prime is 20243357. The reversal of 20243351 is 15334202.

It is a happy number.

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 20243351 - 2² = 20243347 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 (20243357) 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, 11381 + ... + 13038.

It is an arithmetic number, because the mean of its divisors is an integer number (5067150).

Almost surely, 2^20243351 is an apocalyptic number.

20243351 is a deficient number, since it is larger than the sum of its proper divisors (25249).

20243351 is an equidigital number, since it uses as much as digits as its factorization.

20243351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25248.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 20243351 is about 4499.2611615686. The cubic root of 20243351 is about 272.5382534744.

Adding to 20243351 its reverse (15334202), we get a palindrome (35577553).

The spelling of 20243351 in words is "twenty million, two hundred forty-three thousand, three hundred fifty-one".