20707798255 has 16 divisors (see below), whose sum is σ = 25140810240. Its totient is φ = 16372581408.

The previous prime is 20707798253. The next prime is 20707798273. The reversal of 20707798255 is 55289770702.

It is a cyclic number.

It is not a de Polignac number, because 20707798255 - 2¹ = 20707798253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20707798253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219076 + ... + 299014.

It is an arithmetic number, because the mean of its divisors is an integer number (1571300640).

Almost surely, 2^20707798255 is an apocalyptic number.

20707798255 is a deficient number, since it is larger than the sum of its proper divisors (4433011985).

20707798255 is a wasteful number, since it uses less digits than its factorization.

20707798255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80550.

The product of its (nonzero) digits is 2469600, while the sum is 52.

The spelling of 20707798255 in words is "twenty billion, seven hundred seven million, seven hundred ninety-eight thousand, two hundred fifty-five".