18958143783 has 16 divisors (see below), whose sum is σ = 26394149376. Its totient is φ = 12081183840.

The previous prime is 18958143769. The next prime is 18958143803. The reversal of 18958143783 is 38734185981.

It is a happy number.

It is not a de Polignac number, because 18958143783 - 2⁵ = 18958143751 is a prime.

It is a super-2 number, since 2×18958143783² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18958143733) 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 in 15 ways as a sum of consecutive naturals, for example, 13341 + ... + 195177.

It is an arithmetic number, because the mean of its divisors is an integer number (1649634336).

Almost surely, 2^18958143783 is an apocalyptic number.

18958143783 is a deficient number, since it is larger than the sum of its proper divisors (7436005593).

18958143783 is a wasteful number, since it uses less digits than its factorization.

18958143783 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183374.

The product of its digits is 5806080, while the sum is 57.

The spelling of 18958143783 in words is "eighteen billion, nine hundred fifty-eight million, one hundred forty-three thousand, seven hundred eighty-three".