20263745 has 8 divisors (see below), whose sum is σ = 25746984. Its totient is φ = 15257344.

The previous prime is 20263741. The next prime is 20263751. The reversal of 20263745 is 54736202.

It can be written as a sum of positive squares in 4 ways, for example, as 824464 + 19439281 = 908^2 + 4409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20263745 - 2² = 20263741 is a prime.

It is a super-2 number, since 2×20263745² = 821238722850050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20263741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119114 + ... + 119283.

It is an arithmetic number, because the mean of its divisors is an integer number (3218373).

Almost surely, 2^20263745 is an apocalyptic number.

It is an amenable number.

20263745 is a deficient number, since it is larger than the sum of its proper divisors (5483239).

20263745 is a wasteful number, since it uses less digits than its factorization.

20263745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238419.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 20263745 is about 4501.5269631537. The cubic root of 20263745 is about 272.6297449092.

Adding to 20263745 its reverse (54736202), we get a palindrome (74999947).

The spelling of 20263745 in words is "twenty million, two hundred sixty-three thousand, seven hundred forty-five".