18950411887 has 16 divisors (see below), whose sum is σ = 22114929312. Its totient is φ = 16047083520.

The previous prime is 18950411867. The next prime is 18950411933. The reversal of 18950411887 is 78811405981.

It is a cyclic number.

It is not a de Polignac number, because 18950411887 - 2⁷ = 18950411759 is a prime.

It is a super-2 number, since 2×18950411887² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18950411867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 504228 + ... + 540505.

It is an arithmetic number, because the mean of its divisors is an integer number (1382183082).

Almost surely, 2^18950411887 is an apocalyptic number.

18950411887 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

18950411887 is a deficient number, since it is larger than the sum of its proper divisors (3164517425).

18950411887 is a wasteful number, since it uses less digits than its factorization.

18950411887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044858.

The product of its (nonzero) digits is 645120, while the sum is 52.

The spelling of 18950411887 in words is "eighteen billion, nine hundred fifty million, four hundred eleven thousand, eight hundred eighty-seven".