20734263 has 48 divisors (see below), whose sum is σ = 35093760. Its totient is φ = 11664000.

The previous prime is 20734253. The next prime is 20734267. The reversal of 20734263 is 36243702.

It is not a de Polignac number, because 20734263 - 2⁶ = 20734199 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20734267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137238 + ... + 137388.

It is an arithmetic number, because the mean of its divisors is an integer number (731120).

Almost surely, 2^20734263 is an apocalyptic number.

20734263 is a deficient number, since it is larger than the sum of its proper divisors (14359497).

20734263 is a wasteful number, since it uses less digits than its factorization.

20734263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 27.

The square root of 20734263 is about 4553.4891017768. The cubic root of 20734263 is about 274.7237468233.

Adding to 20734263 its reverse (36243702), we get a palindrome (56977965).

It can be divided in two parts, 2073 and 4263, that added together give a palindrome (6336).

The spelling of 20734263 in words is "twenty million, seven hundred thirty-four thousand, two hundred sixty-three".