20725350055 has 16 divisors (see below), whose sum is σ = 25454255904. Its totient is φ = 16191221760.

The previous prime is 20725350017. The next prime is 20725350077. The reversal of 20725350055 is 55005352702.

It is not a de Polignac number, because 20725350055 - 2¹⁹ = 20724825767 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20725350055.

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, 1524247 + ... + 1537783.

It is an arithmetic number, because the mean of its divisors is an integer number (1590890994).

Almost surely, 2^20725350055 is an apocalyptic number.

20725350055 is a deficient number, since it is larger than the sum of its proper divisors (4728905849).

20725350055 is a wasteful number, since it uses less digits than its factorization.

20725350055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20706.

The product of its (nonzero) digits is 52500, while the sum is 34.

The spelling of 20725350055 in words is "twenty billion, seven hundred twenty-five million, three hundred fifty thousand, fifty-five".