19772727258 has 32 divisors (see below), whose sum is σ = 40710913920. Its totient is φ = 6397513920.

The previous prime is 19772727167. The next prime is 19772727301. The reversal of 19772727258 is 85272727791.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 19772727198 and 19772727207.

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, 12318 + ... + 199241.

It is an arithmetic number, because the mean of its divisors is an integer number (1272216060).

Almost surely, 2^19772727258 is an apocalyptic number.

19772727258 is an abundant number, since it is smaller than the sum of its proper divisors (20938186662).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19772727258 is a wasteful number, since it uses less digits than its factorization.

19772727258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212022.

The product of its digits is 6914880, while the sum is 57.

It can be divided in two parts, 19 and 772727258, that added together give a palindrome (772727277).

The spelling of 19772727258 in words is "nineteen billion, seven hundred seventy-two million, seven hundred twenty-seven thousand, two hundred fifty-eight".