20740255 has 8 divisors (see below), whose sum is σ = 26352432. Its totient is φ = 15616128.

The previous prime is 20740253. The next prime is 20740259. The reversal of 20740255 is 55204702.

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 20740255 - 2¹ = 20740253 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 (20740253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121917 + ... + 122086.

It is an arithmetic number, because the mean of its divisors is an integer number (3294054).

Almost surely, 2^20740255 is an apocalyptic number.

20740255 is a deficient number, since it is larger than the sum of its proper divisors (5612177).

20740255 is a wasteful number, since it uses less digits than its factorization.

20740255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244025.

The product of its (nonzero) digits is 2800, while the sum is 25.

The square root of 20740255 is about 4554.1470112415. The cubic root of 20740255 is about 274.7502084365.

Adding to 20740255 its reverse (55204702), we get a palindrome (75944957).

The spelling of 20740255 in words is "twenty million, seven hundred forty thousand, two hundred fifty-five".