19945230650 has 12 divisors (see below), whose sum is σ = 37098129102. Its totient is φ = 7978092240.

The previous prime is 19945230593. The next prime is 19945230707. The reversal of 19945230650 is 5603254991.

It is an interprime number because it is at equal distance from previous prime (19945230593) and next prime (19945230707).

It can be written as a sum of positive squares in 3 ways, for example, as 14250868129 + 5694362521 = 119377^2 + 75461^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 199452257 + ... + 199452356.

Almost surely, 2^19945230650 is an apocalyptic number.

19945230650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19945230650 is a deficient number, since it is larger than the sum of its proper divisors (17152898452).

19945230650 is a wasteful number, since it uses less digits than its factorization.

19945230650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398904625 (or 398904620 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 44.

The spelling of 19945230650 in words is "nineteen billion, nine hundred forty-five million, two hundred thirty thousand, six hundred fifty".