20625227858 has 12 divisors (see below), whose sum is σ = 31710832890. Its totient is φ = 10061085120.

The previous prime is 20625227809. The next prime is 20625227881. The reversal of 20625227858 is 85872252602.

It can be written as a sum of positive squares in 3 ways, for example, as 13531040329 + 7094187529 = 116323^2 + 84227^2 .

It is a Curzon number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 3064043 + ... + 3070766.

Almost surely, 2^20625227858 is an apocalyptic number.

20625227858 is a deficient number, since it is larger than the sum of its proper divisors (11085605032).

20625227858 is an equidigital number, since it uses as much as digits as its factorization.

20625227858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6134893 (or 6134852 counting only the distinct ones).

The product of its (nonzero) digits is 1075200, while the sum is 47.

The spelling of 20625227858 in words is "twenty billion, six hundred twenty-five million, two hundred twenty-seven thousand, eight hundred fifty-eight".