20639062255 has 16 divisors (see below), whose sum is σ = 28564683840. Its totient is φ = 14022657792.

The previous prime is 20639062237. The next prime is 20639062261. The reversal of 20639062255 is 55226093602.

It is a cyclic number.

It is not a de Polignac number, because 20639062255 - 2⁹ = 20639061743 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2701174 + ... + 2708803.

It is an arithmetic number, because the mean of its divisors is an integer number (1785292740).

Almost surely, 2^20639062255 is an apocalyptic number.

20639062255 is a deficient number, since it is larger than the sum of its proper divisors (7925621585).

20639062255 is a wasteful number, since it uses less digits than its factorization.

20639062255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5410098.

The product of its (nonzero) digits is 194400, while the sum is 40.

The spelling of 20639062255 in words is "twenty billion, six hundred thirty-nine million, sixty-two thousand, two hundred fifty-five".