20263005 has 24 divisors (see below), whose sum is σ = 40140672. Its totient is φ = 9262944.

The previous prime is 20262989. The next prime is 20263007. The reversal of 20263005 is 50036202.

It is not a de Polignac number, because 20263005 - 2⁴ = 20262989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20263007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 31849 + ... + 32478.

It is an arithmetic number, because the mean of its divisors is an integer number (1672528).

Almost surely, 2^20263005 is an apocalyptic number.

It is an amenable number.

20263005 is a deficient number, since it is larger than the sum of its proper divisors (19877667).

20263005 is a wasteful number, since it uses less digits than its factorization.

20263005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64345 (or 64342 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 20263005 is about 4501.4447680717. Note that the first 3 decimals coincide. The cubic root of 20263005 is about 272.6264261994.

Adding to 20263005 its reverse (50036202), we get a palindrome (70299207).

The spelling of 20263005 in words is "twenty million, two hundred sixty-three thousand, five".