20245331 has 4 divisors (see below), whose sum is σ = 20262000. Its totient is φ = 20228664.

The previous prime is 20245301. The next prime is 20245339. The reversal of 20245331 is 13354202.

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 20245331 - 2²² = 16051027 is a prime.

It is a super-2 number, since 2×20245331² = 819746854599122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20245339) 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, 6356 + ... + 8993.

It is an arithmetic number, because the mean of its divisors is an integer number (5065500).

Almost surely, 2^20245331 is an apocalyptic number.

20245331 is a deficient number, since it is larger than the sum of its proper divisors (16669).

20245331 is a wasteful number, since it uses less digits than its factorization.

20245331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16668.

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

The square root of 20245331 is about 4499.4811923154. The cubic root of 20245331 is about 272.5471388305.

Adding to 20245331 its reverse (13354202), we get a palindrome (33599533).

The spelling of 20245331 in words is "twenty million, two hundred forty-five thousand, three hundred thirty-one".