19228025961 has 6 divisors (see below), whose sum is σ = 27773815290. Its totient is φ = 12818683968.

The previous prime is 19228025953. The next prime is 19228025981. The reversal of 19228025961 is 16952082291.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18102087936 + 1125938025 = 134544^2 + 33555^2 .

It is not a de Polignac number, because 19228025961 - 2³ = 19228025953 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (19228025941) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1068223656 + ... + 1068223673.

It is an arithmetic number, because the mean of its divisors is an integer number (4628969215).

Almost surely, 2^19228025961 is an apocalyptic number.

It is an amenable number.

19228025961 is a deficient number, since it is larger than the sum of its proper divisors (8545789329).

19228025961 is a wasteful number, since it uses less digits than its factorization.

19228025961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2136447335 (or 2136447332 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 19228025961 in words is "nineteen billion, two hundred twenty-eight million, twenty-five thousand, nine hundred sixty-one".