20072263 has 4 divisors (see below), whose sum is σ = 20764440. Its totient is φ = 19380088.

The previous prime is 20072209. The next prime is 20072267. The reversal of 20072263 is 36227002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20072263 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 (20072267) 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, 346045 + ... + 346102.

It is an arithmetic number, because the mean of its divisors is an integer number (5191110).

Almost surely, 2^20072263 is an apocalyptic number.

20072263 is a deficient number, since it is larger than the sum of its proper divisors (692177).

20072263 is an equidigital number, since it uses as much as digits as its factorization.

20072263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692176.

The product of its (nonzero) digits is 1008, while the sum is 22.

The square root of 20072263 is about 4480.2079192823. The cubic root of 20072263 is about 271.7682886447.

Adding to 20072263 its reverse (36227002), we get a palindrome (56299265).

The spelling of 20072263 in words is "twenty million, seventy-two thousand, two hundred sixty-three".