18950995834 has 4 divisors (see below), whose sum is σ = 28426493754. Its totient is φ = 9475497916.

The previous prime is 18950995831. The next prime is 18950995841. The reversal of 18950995834 is 43859905981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43859905981 = 1291 ⋅33973591.

It can be written as a sum of positive squares in only one way, i.e., 10769250625 + 8181745209 = 103775^2 + 90453^2 .

It is not an unprimeable number, because it can be changed into a prime (18950995831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4737748957 + ... + 4737748960.

Almost surely, 2^18950995834 is an apocalyptic number.

18950995834 is a deficient number, since it is larger than the sum of its proper divisors (9475497920).

18950995834 is an equidigital number, since it uses as much as digits as its factorization.

18950995834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9475497919.

The product of its (nonzero) digits is 13996800, while the sum is 61.

The spelling of 18950995834 in words is "eighteen billion, nine hundred fifty million, nine hundred ninety-five thousand, eight hundred thirty-four".